Matrix Stem
 |
 Ritchey Wcs 4 AXIS CARBON MATRIX 110MM 318 ROAD STEM $79.93 Time Remaining: 24d 50m Buy It Now for only: $79.93 Buy It Now |
 Ritchey WCS Carbon Matrix 4 Axis Stem 120mm Used $5.50 (3 Bids) Time Remaining: 3h 30m |
 Ritchey Pro 4 Axis 44 Carbon Fiber Matrix Stem 84d 100mm 318mm 1 1 8 3k Degree $98.95 Time Remaining: 22d 15h 29m Buy It Now for only: $98.95 Buy It Now |
 Ritchey Pro Carbon Matrix Stem 4Axis44 110mm 318 NEW MSRP 11000 $84.99 Time Remaining: 5d 18h 31m Buy It Now for only: $84.99 Buy It Now |
 2012 Ritchey WCS Carbon Matrix 4 Axis Stem 120mm 84D UD $46.00 (3 Bids) Time Remaining: 2d 33m |
 Ritchey WCS Matrix UD Carbon 4 Axis Stem Faceplate $24.93 Time Remaining: 1d 4m Buy It Now for only: $24.93 Buy It Now |
 Ritchey WCS Carbon 4 Axis Matrix Stem 110mm New $84.99 Time Remaining: 28d 13h 13m Buy It Now for only: $84.99 Buy It Now |
 FIT TOYOTA TRD TIRE WHEEL STEM VALVE CAPS WRENCH KEYCHAIN RACING DEVELOPMENT $7.99 Time Remaining: 2h 29m Buy It Now for only: $8.79 Buy It Now |
 Ritchey WCS 3K Carbon Matrix Handlebar Stem 110mm $126.34 Time Remaining: 23d 14h 27m Buy It Now for only: $126.34 Buy It Now |
 Ritchey WCS Carbon 4 Axis Matrix Stem 130mm 3K New $84.99 Time Remaining: 27d 13h 13m Buy It Now for only: $84.99 Buy It Now |
 NEW TOKEN Carbon Fiber Alloy MATRIX Stem TK931AC 260x130mm 10 $39.97 Time Remaining: 27d 19h 13m Buy It Now for only: $39.97 Buy It Now |
 NEW Ritchey Carbon Matrix 4 Axis WCS 110 Stem 318 $89.00 Time Remaining: 4d 23h 14m |
 Ritchey 2012 Pro 4 Axis 44 Carbon Matrix Bike Stem 6 84 deg 318 x 110mm $99.95 Time Remaining: 26d 18h 20m Buy It Now for only: $99.95 Buy It Now |
 Ritchey WCS 4 Axis Carbon Fiber Matrix Stem 84d 100mm 318mm 1 1 8 3k Degree $99.45 Time Remaining: 13d 22h 57m Buy It Now for only: $99.45 Buy It Now |
 2012 Ritchey WCS 4 Axis Matrix UD Carbon Stem 318mm 100mm New $98.50 Time Remaining: 4d 23h 50m Buy It Now for only: $111.00 Buy It Now |
 Ritchey Carbon Matrix Wcs 4 Axis 110 Stem $50.00 Time Remaining: 29d 22h 7m Buy It Now for only: $50.00 Buy It Now |
 Matrix Wing Carbon Handlebar Stem Integrated RED 100mm $159.00 Time Remaining: 9d 12h 44m Buy It Now for only: $159.00 Buy It Now |
 Matrix Wing Carbon Handlebar Stem Integrated RED 110mm $159.00 Time Remaining: 1d 12h 17m Buy It Now for only: $159.00 Buy It Now |
 NISSAN 200SX 240SX 300ZX 350Z 370Z ALTIMA MAXIMA CHROME WHEEL VALVE STEM CAPS $0.99 Time Remaining: 9h 42m |
 Matrix Bike Stem Black 318 x 90mm Carbon + 10 degree New $85.99 Time Remaining: 11d 9h 47m Buy It Now for only: $85.99 Buy It Now |
 Matrix Carbon Stem Bike Stem Black 318 x 110mm + 10 degree New $85.99 Time Remaining: 20d 13h 17m Buy It Now for only: $85.99 Buy It Now |
 TRD TOYOTA SCION LEXUS TIRE WHEEL RIMS STEM VALVE CAPS WRENCH KEYCHAIN SET $9.99 Time Remaining: 20h 13m Buy It Now for only: $11.99 Buy It Now |
 Ritchey WCS C260 4 Axis Carbon Fiber Matrix Stem 84d 70mm 318 1 1 8 UD Degree $143.95 Time Remaining: 2d 22h 17m Buy It Now for only: $143.95 Buy It Now |
 Ritchey WCS C260 4 Axis Carbon Fiber Matrix Stem 84d 100mm 318 1 1 8 UD Degree $143.95 Time Remaining: 19d 21h 32m Buy It Now for only: $143.95 Buy It Now |
 Ritchey Pro 4 Axis 44 Carbon Fiber Matrix Stem 84d 90mm 318mm 1 1 8 3k Degree $98.95 Time Remaining: 4d 17h 59m Buy It Now for only: $98.95 Buy It Now |
 BMW 128 135 318 325 330 535 650 750 M3 M5 X5 X6 Z4 CHROME WHEEL VALVE STEM CAPS $0.99 Time Remaining: 19h 2m |
 4 TIRE WHEEL VALVE CAPS STEM TRD TOYOTA SCION NEW ALLOY $8.99 Time Remaining: 14d 9h 36m Buy It Now for only: $8.99 Buy It Now |
 4x CAR BIKE CHROME BRASS WHEEL TIRE TYRE AIR DUST VALVE STEM CAP COVERS $2.85 Time Remaining: 22d 22h 16m Buy It Now for only: $2.85 Buy It Now |
 UNIVERSAL TOYOTA TIRE WHEEL RIMS STEM VALVE CAPS WRENCH KEYCHAIN CHROME SET $9.99 Time Remaining: 20h 13m Buy It Now for only: $11.99 Buy It Now |
 RITCHEY WCS 4 AXIS CARBON MATRIX 130MM 318 ROAD STEM $74.93 Time Remaining: 25d 16m Buy It Now for only: $74.93 Buy It Now |
 Matrix Full 12K Carbon Stem 318 x 110 mm Black White 1 1 8 MTB Road New $85.00 Time Remaining: 23d 8h 24m Buy It Now for only: $85.00 Buy It Now |
 NEW 2012 Ritchey WCS Carbon Matrix C260 Stem 100mm 84 6 Road Mountain $143.95 Time Remaining: 18d 6h 38m Buy It Now for only: $143.95 Buy It Now |
 TOYOTA TUNDRA TACOMA TRUCK CHROME TIRE WHEEL STEM VALVE CAPS WRENCH KEYCHAIN $8.99 Time Remaining: 1d 2h 29m Buy It Now for only: $9.89 Buy It Now |
 Ritchey Pro 4 Axis 44 Matrix Carbon Alloy 318mm x 110mm 6D Stem $69.90 Time Remaining: 6d 4h 25m Buy It Now for only: $69.90 Buy It Now |
 Toyota Tyre Tire Valves Stem Caps Anti Theft Locking $4.99 Time Remaining: 7d 10h 42m Buy It Now for only: $4.99 Buy It Now |
 TOYOTA MATRIX COROLLA CELICA HIGHLANDER AVALON PRIUS CHROME VALVE STEM CAPS $0.99 Time Remaining: 9h 2m |
 4 PCS TIRE VALVE CAPS STEM TRD TOYOTA SCION NEW ALLOY $3.95 Time Remaining: 27d 20h 3m Buy It Now for only: $3.95 Buy It Now |
 Ritchey WCS C260 4 Axis Carbon Fiber Matrix Stem 84d 90mm 318 1 1 8 UD Degree $143.95 Time Remaining: 2d 23h 32m Buy It Now for only: $143.95 Buy It Now |
 Toyota FJ Cruiser Highlander RAV4 Tire Valve Stem Caps $7.95 Time Remaining: 24d 1h 7m Buy It Now for only: $7.95 Buy It Now |
 Toyota Tyre Tire Valves Stem Caps Anti Theft Locking $0.99 Time Remaining: 1d 1h 20m |
 Ritchey 2012 WCS Carbon Matrix 4 Axis 3K Bike Bicycle Stem 318 x 100mm $129.95 Time Remaining: 22d 4h 12m Buy It Now for only: $129.95 Buy It Now |
 Toyota Celica Supra MR2 Spyder Tire Valve Stem Caps $7.95 Time Remaining: 24d 1h 7m Buy It Now for only: $7.95 Buy It Now |
 NATURAL CRINOID FOSSIL STEMS IN MATRIX $4.00 Time Remaining: 2d 21h 28m |
 Tyre Tire Valve Stem Caps Air Dust Covers+Tool Wrench Modified Toyota 5pcs 1 set $7.99 Time Remaining: 6d 4h 8m Buy It Now for only: $7.99 Buy It Now |
 Ritchey WCS 4 Axis Carbon Fiber Matrix Stem 84d 110mm 318mm 1 1 8 UD Degree $99.45 Time Remaining: 16d 2h 3m Buy It Now for only: $99.45 Buy It Now |
 TIRE VALVE CAPS STEM TRD TOYOTA MR2 COROLLA CAMRY RAV4 $3.95 Time Remaining: 18d 8h 48m Buy It Now for only: $3.95 Buy It Now |
 Toyota TRD Tyre Tire Valves Stem Cap Anti Theft Locking $0.99 (1 Bid) Time Remaining: 1d 1h 20m |
 TIRE VALVE CAPS STEM TRD TACOMA MATRIX 4RUNNER SIENNA $3.99 Time Remaining: 27d 4h 48m Buy It Now for only: $3.99 Buy It Now |
 Toyota TRD Tyre Tire Valves Stem Cap Anti Theft Locking $4.99 Time Remaining: 19d 45m Buy It Now for only: $4.99 Buy It Now |
 VW TIRE WHEEL VALVE CAPS JETTA STEM CHROME GOLF GTI $0.99 Time Remaining: 2d 19h 2m |
 Ritchey WCS Carbon Matrix 4 Axis Stem 1 1 8 120mm 318 $99.93 Time Remaining: 9d 15m Buy It Now for only: $99.93 Buy It Now |
 Toyota TRD Logo Emblem Wheel Tire Valve tyre valve Air Caps + Wrench key chain $4.99 Time Remaining: 16d 8h 29m Buy It Now for only: $4.99 Buy It Now |
 TOYOTA CELICA CAMRY COROLLA CHROME TIRE WHEEL STEM VALVE CAPS WRENCH KEYCHAIN $8.99 Time Remaining: 2d 3h 4m Buy It Now for only: $9.89 Buy It Now |
 HKS TOYOTA HONDA TIRE VALVE STEM CAP CAPS + KEY CHAIN $4.99 Time Remaining: 16d 23h 50m Buy It Now for only: $4.99 Buy It Now |
 Ritchey WCS Matrix Carbon Weave 4 Axis Stem Faceplate $22.93 Time Remaining: 15d 16m Buy It Now for only: $22.93 Buy It Now |
 Ritchey WCS C260 4 Axis Carbon Fiber Matrix Stem 84d 110mm 318 1 1 8 UD Degree $143.95 Time Remaining: 21d 20h 6m Buy It Now for only: $143.95 Buy It Now |
 4 X Car Wheel Tyre Tire Valve Stem Air Covers Caps for Toyota + Wrench Keyring $0.99 (1 Bid) Time Remaining: 4d 3h 28m |
 Supertech Valve Stem Seals Celica GT Matrix 1ZZ 1ZZ FE $29.00 Time Remaining: 23d 38m Buy It Now for only: $29.00 Buy It Now |
 Toyota Echo Yaris Matrix Corolla Tire Valve Stem Caps $7.95 Time Remaining: 24d 1h 7m Buy It Now for only: $7.95 Buy It Now |
 Hyunda car Emblem Wheel Tyre Tire Valve Stems Dust Air Caps Covers 4 pcs one set $0.99 Time Remaining: 2d 3h 5m |
 NEW Ritchey WCS Carbon 4 Axis Matrix Stem 110mm $110.00 Time Remaining: 28d 21h 6m Buy It Now for only: $110.00 Buy It Now |
 Toyota Emblem Tyre Tire Valve Stem Dust Air Caps Covers $4.99 Time Remaining: 29d 9h 11m Buy It Now for only: $4.99 Buy It Now |
 Ritchey 2012 Pro 4 Axis 44 Carbon Matrix Bike Stem 6 84 deg 318 x 100mm $99.95 Time Remaining: 15d 23h 34m Buy It Now for only: $99.95 Buy It Now |
 Toyota Emblem Tyre Tire Valve Stem Dust Air Caps Covers $0.99 Time Remaining: 2d 3h 5m |
 Toyota Logo Tire Wheel Valve Cap Stems Keychain CR V RAV4 Jeep Camry Black New $8.99 Time Remaining: 14d 4h 1m Buy It Now for only: $8.99 Buy It Now |
 Fel Pro SS72878 1 Valve Stem Seal Set $33.82 Time Remaining: 21d 16h 15m Buy It Now for only: $33.82 Buy It Now |
 TRD Hood Emblem Wheel Tyre Tire Valve Stem Dust Air Caps Covers for Toyota Auto $0.99 Time Remaining: 2d 3h 5m |
 Ritchey WCS C260 4 Axis Carbon Fiber Matrix Stem 84d 120mm 318 1 1 8 UD Degree $143.95 Time Remaining: 27d 5h 45m Buy It Now for only: $143.95 Buy It Now |
 TOYOTA CELICA CAMRY COROLLA CHROME TIRE WHEEL STEM VALVE CAPS WRENCH KEYCHAIN $9.89 Time Remaining: 22d 20h 14m Buy It Now for only: $9.89 Buy It Now |
 Ritchey WCS Carbon 4 Axis Matrix Stem 130mm UD New $84.99 Time Remaining: 25d 19h 23m Buy It Now for only: $84.99 Buy It Now |
 Tyre Tire Valve Stem Caps Air Dust Covers+Tool Wrench Modified Toyota 5pcs 1 set $0.99 (1 Bid) Time Remaining: 5d 1h 34m |
 Matrix Wing Carbon Handlebar Stem Combined 90100110mm $154.87 Time Remaining: 13d 21h 14m Buy It Now for only: $154.87 Buy It Now |
 TRD TIRE VALVE CAPS STEM TACOMA MATRIX 4RUNNER SIENNA $11.99 Time Remaining: 20d 6h 33m Buy It Now for only: $11.99 Buy It Now |
 MITSUBISHI CHEVY INFINITI TIRE VALVE STEMS CAPS CHROME $0.99 (1 Bid) Time Remaining: 2d 12h 2m |
 Valve Stem Seal NEW Toyota Camry PART CAR AUTO $22.49 Time Remaining: 28d 3h 48m Buy It Now for only: $22.49 Buy It Now |
 Ritchey WCS 4 Axis Carbon Fiber Matrix Stem 84d 100mm 318mm 1 1 8 UD Degree $125.95 Time Remaining: 2d 23h 29m Buy It Now for only: $125.95 Buy It Now |
 Matrix Wing Carbon Hanglebar Stem Combined 100 x 580mm $151.50 Time Remaining: 15d 14h 9m Buy It Now for only: $151.50 Buy It Now |
 SCION xA xB tC xD RELEASE SERIES CHROME WHEEL VALVE STEM CAPS $0.99 Time Remaining: 2d 12h 42m |
 Ritchey WCS C260 4 Axis Carbon Fiber Matrix Stem 84d 80mm 318 1 1 8 UD Degree $143.95 Time Remaining: 17d 12h 5m Buy It Now for only: $143.95 Buy It Now |
 New Toyota Logo Valve Stem Cap W Key Chain MR2 Celica Matrix Camry Supra Prius $7.94 Time Remaining: 3d 2h 12m Buy It Now for only: $7.94 Buy It Now |
 TIRE WHEEL VALVE STEM CAPS CORVETTE C5 C6 CAMARO CHROME $0.99 Time Remaining: 2d 23h 42m |
 4 RAYS VOLK RACING BLUE FORGED ALUMINUM VALVE STEM CAPS WHEELS RIMS UNIVERSAL T $89.95 Time Remaining: 11d 3h 56m Buy It Now for only: $89.95 Buy It Now |
 Ritchey WCS C260 Stem Carbon Matrix 100mm 84 96 deg $146.81 Time Remaining: 24d 19h 5m Buy It Now for only: $146.81 Buy It Now |
 TRD Tyre Tire Stems Valve Cap Air Dust Covers+Tool Wrench Modified Toyota Lexus $7.99 Time Remaining: 6d 4h 28m Buy It Now for only: $7.99 Buy It Now |
 TRD Tyre Tire Stems Valve Cap Air Dust Covers+Tool Wrench Modified Toyota Lexus $1.05 (2 Bids) Time Remaining: 5d 1h 34m |
 FIT TOYOTA TRD TIRE WHEEL STEM VALVE CAPS WRENCH KEYCHAIN RACING DEVELOPMENT $8.79 Time Remaining: 22d 20h 19m Buy It Now for only: $8.79 Buy It Now |
 NEW 2012 Ritchey WCS Carbon Matrix C260 Stem 70mm 84 6 Road Mountain $143.95 Time Remaining: 18d 6h 35m Buy It Now for only: $143.95 Buy It Now |
 4 Aluminum Green Nitrogen VALVE STEM CAPS Toyota Avalon Matrix Corolla $3.95 Time Remaining: 6d 2h 4m |
 2012 Ritchey Pro 4 Axis 44 Carbon Matrix Stem 120mm 84d $112.12 Time Remaining: 28d 18h 40m Buy It Now for only: $112.12 Buy It Now |
 Rock Products VSS943 Valve Stem Seal Set $27.51 Time Remaining: 11d 14h 55m Buy It Now for only: $27.51 Buy It Now |
Tissue Engineering: An Explanation of How Stem Cells Can be Used to Regrow Cartilage
The perpetual search for the Fountain of Youth has both fascinated as well as eluded human beings for centuries.
What has been particularly interesting has been the observation that other species (eg, earthworms, salamanders, etc.) can regenerate severed body parts... but human beings cannot.
The recent surge in interest in tissue engineering has been prompted by the scientific discoveries that perhaps the use of stem cell technology may allow a certain degree of if tissue healing and regeneration to take place. Certainly, at least some of the impetus arises from the desire of Baby Boomers to remain active and healthy.
In the medical arena, there has been intense interest, particularly in the field of arthritis, regarding the potential use of stem cell technology to regrow cartilage.
It might be useful to quickly review what stem cells are and what types of stem cells might be used.
Stem cells are pluripotential progenitor cells. What this means is that these cells have not yet committed to become a specific type of tissue. Stem cells are the earliest type of cell. They have not yet "committed" to becoming a specific type of organ cell. However, given a specific stimulus, they can differentiate into any type of tissue. A heart cell... a lung cell... a brain cell... and so on.
There are three main types of stem cells that have been used in research to treat medical conditions.
The first are embryonic stem cells. These are obtained from a fetus. Of the three types of stem cells, embryonic stem cells are the cells that probably have the greatest potential to differentiate and multiply. However, there are concerns. Stem cells have been found to lead to cancer in at least one case of a boy who was given stem cells to treat a rare neurologic disorder. According to the Associated Press, "For all the promise, researchers have long warned that they must learn to control newly injected stem cells so they don't grow where they shouldn't, and small studies in people are only just beginning..." In addition, the ethical debate regarding the use of embryonic stem cells is also not over.
The second type of stem cell is called the "mesenchymal donor cell.' These are stem cells that are harvested from the bone marrow of normal volunteers. These have the potential to be quite useful. One advantage is that a large concentration of stem cells can be produced through this process. Questions still remain regarding the possibility of rejection reactions as well as the theoretical danger of transmission of viruses.
The most commonly used stem cells currently are autologous stem cells. These are stem cells that are obtained from the bone marrow of the patient. Stem cells by themselves may not be effective in differentiating into the tissue that is desired.
Stem cells are stimulated to multiply and divide because they have tyrosine kinase receptors on their surface which permit engagement with various growth factors. Growth factors present in blood- and in even higher concentration in platelet rich plasma (PRP) bind to the tyrosine kinase receptors and send a signal to the nucleus of the cell that leads to replication.
In addition to these natural occurring growth factors, scientists are studying the ability of substances such as bone morphogenic protein (BMP) to stimulate bone and cartilage growth.
Also, in order for stem cells to replicate, they require a matrix which is capable of acting as a "home base." Different types of matrices form a framework in which stem cells can multiply and divide. Currently, scientists are studying various types of matrices to see which is the most effective.
From this discussion, it is quite clear that there are many questions that need to be addressed and answered. Regardless of the complexity of stem cell technology, it is clear that this area of regenerative medicine holds a great deal of promise for the future.
About the Author
Nathan Wei, MD FACP FACR is a nationally known board-certified rheumatologist. For more info:
Arthritis Treatment
and
Tendonitis Treatment Tips
 Ritchey WCS 4-Axis Matrix stem, (31.8) 6/84dx110 3K List Price: Sale Price: $104.34 You save: $35.61 (25%)  Eligible for free shipping!Availability: Usually ships in 4-5 business days See Reviews For This Product DescriptionMatrix carbon-over-alloy for best strength to weight ratio, 3x stronger than alloy alone . The alloy reinforces the carbon, the carbon reduces fatigue to the alloy. Contoured narrow 4-bolt pinch clamp prevents crushing lightweight bars...  |
 Beck Arnley 022-5021 Valve Stem Seal, Pack of 4 List Price: Sale Price: $12.78 You save: $9.82 (43%) Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionSince 1914, Beck/Arnley has focused on the customer, offering high quality parts that look and perform the same as the original part. This ideal has never changed. Today, Beck/Arnley is committed to being the premium supplier of high quality import parts within the automotive market... |
 Mechanobiology of Cell-Cell and Cell-Matrix Interactions List Price: Sale Price: $148.31 You save: $30.69 (17%) Eligible for free shipping!Availability: Not yet published See Reviews For This Product DescriptionMechanobiology of Cell-Matrix Interactions focuses on characterization and modeling of interactions between cells and their local extracellular environment, exploring how these interactions may mediate cell behavior... |
 Ritchey WCS 4 Axis Matrix Carbon Stem See Reviews For This Product DescriptionCyclo-Cross World Cup, Mountain Bike World Championships, ProTour, Spring Classics, Tour de France... |
 Beck Arnley 022-5022 Valve Stem Seal, Pack of 4 List Price: Sale Price: $9.08 You save: $6.00 (40%) Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionSince 1914, Beck/Arnley has focused on the customer, offering high quality parts that look and perform the same as the original part. This ideal has never changed. Today, Beck/Arnley is committed to being the premium supplier of high quality import parts within the automotive market... |
 Perforation Repair with Dental Pulp Stem Cells and DMP1: A New Approach to Repair Teeth Perforations Utilizing Dental Pulp Stem Cells and Dentin Matrix Protein 1 An Animal Model List Price: Sale Price: $56.50 You save: $15.50 (22%) Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionPerforations due to iatrogenic errors can compromise the tooth prognosis. There is still no ideal endodontic material in the market to be used in a perforation site. This study evaluates the ability of Dental Pulp Stem Cells (DPSCs) and Dentin Matrix Protein 1 (DMP1) impregnated within a collagen scaffold to induce dentin formation in a furcal perforation site... |
 Ritchey WCS 4-Axis Matrix stem, (31.8) 6/84dx110 UD List Price: Sale Price: $132.95 You save: $7.00 (5%) Eligible for free shipping!Availability: Usually ships in 1-2 business days See Reviews For This Product DescriptionMatrix carbon-over-alloy for best strength to weight ratio, 3x stronger than alloy alone . The alloy reinforces the carbon, the carbon reduces fatigue to the alloy. Contoured narrow 4-bolt pinch clamp prevents crushing lightweight bars... |
 Ishino Valve Stem Seal Sale Price: $7.08 Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionIshino Valve Stem Seal - grey color; 1994-2003 Lexus ES300; 2002-2003 Lexus RX300, FWD; 2004 Lexus RX330, FWD; 1995-2003 Toyota Avalon; 1994 Toyota Camry LE, Sedan, V6 3.0L, Ch:MCV1; 1994 Toyota Camry SE; 1994 Toyota Camry, Wagon, V6 3... |
 Ritchey WCS 4-Axis Matrix Carbonalloy Stem One Color, 31.8mm,120mm,84d,3k Sale Price: $139.95 Eligible for free shipping!Availability: Usually ships in 1-2 business days See Reviews For This Product DescriptionTrump the XC crowd with the Ritchey WCS 4-Axis Matrix Carbonalloy Stem. Ritchey forged the stem out of 2014 alloy, then encases it in high-modulus carbon fiber to increase strength and reduce fatigue. To top it all off, they spec'd titanium boltsmaking the Matrix Carbon alloy one of the lightest stems available... |
