FOSS Polymer inner tubes are made of a high-polymericed rubber mixture, but without being vulcanized. If punctured the tube material forms an air-tight seal around the thorn, nail or puncture intent sliver of glass, retarding the speed of the leaking air, so that you hardly notice any air loss. This increases the durability of the tire in case of a defect as no explosive air loss occurs. Thus the tube is considerably more puncture resistant than a normal butyl tube. Due to the low density, the FOSS tube is 30% lighter at the same size compared to a conventional tube. The tubes are also completely recyclable.
PLEASE NOTE: These tubes can not be patched with a normal patch. There are special self-adhesive FOSS patches required. Alternatively, the tube can be vulcanized, e.g. heatet up with a lighter and "glued" on the damage location with a flat nose plier.
ATTENTION: Do not pump/test the tube in the absence of outer tire. Excessive pumping will result in deformation of the inner tube. FOSS tubes are not reccomended for carbon rim brake rims.
One coupon per order
Discount taken off MSRP for normal items
Custom kit pricing is complicated so we take the discount off the current build price
In stock items only
Coupons can not be combined with promotional gift certificates, however, purchased gift certificates may be used with the coupons. If you would like to use your coupon with a purchased gift certificate, please leave the gift certificate information in the comments section at checkout, and they will be applied during processing on the backend.
Some items are restricted
Groupsets, hand built wheels, special orders & labor costs are excluded from the coupon.
Additional exclusions may apply.