Designed specifically to fit your original fixing cups. these bearings are used to replace the old bearings exactly.
The bearings are based around a Precison hardened bearing steel shell, with stainless steel inner rings and Beraing steel races, this material is both harder and less liable to distort than stainless races.These are widely known as Hybrid Bearings, because of the different materials used.
From the outside , they look as any normal bearing, but within the heart lies a true technological gem.The ceramic balls fitted to these bearings are superior Grade 5 Si3N4 loose bearings , which are super slippery and made to tolerances far on and above any chrome steel ball.
Silicon Nitride (Si3N4) Series: A new material suitable for applications where high loads, high speeds and extreme temperatures are factors. Long life and the need for minimum lubrication makes this material perfect for harsh conditions. Si3N4 is anti-magnetic. Maximum useful temperature is 2552°F.
Carbontec use Si3N4...because of the properties the balls needs less lubrication than zirconia, under the same conditions for friction free smooth rotation
Properties and technology mean there really is no substitute for bearings, and when coupled with their light weight mean they are truly the only choice for bicycle applications.
To put it into perspective, these bearings, are both stronger and last between 10 to 20 times longer than a normal steel ball, meaning they are replaced less often, give a slick anti friction rotation, and when stacked up to their relative cost, give excellent value for money.
What you receive are a PAIR of cartridges which will fit any existing shimano road cup, that's Tiagra,105, Ultegra and of course (Dura Ace pre 2004), plus any of the off road family, LX, XT or (XTR pre 2004). Carbontec will warrant every pair sold, provided they are fitted and used within the terms of our user guide lines.
**BEST SELLER** NORMAL RETAIL £49.99 **BEST SELLER** NEW LOWER PRICES, BEST VALUE EVER
**Must be installed by a cycle shop technician or by a professional technician.as this ensures the 2 year warranty**
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