Challenge Latex Inner Tube A 26mm internal width provides

A 26mm internal width provides broad base for wide tubeless gravel tyres

the chances are that the bearings in your jockey wheels / derailleur pulleys are getting a bit slack

BBB BDP-12 is a straight swap into your SHIMANO GRX 11s 1X mech

- SL version 85kg rider weight limit

but with extra Z giving a bit more side tread

Challenge Latex Inner Tube A 26mm internal width providesThis is the same inner tube as found in Challenge and FMB's cyclo cross tubular tyres We have been long time users of latex tubes for cross, they offer a weight saving and are more puncture & pinch resistant than a standard butyl tube When combined with an open tubular tyre and a reasonably wide rim, they are as close to tubular tyre feel that clinchers (or tubeless) can get You will note that we normally stock and prefer Dugast's Latex Inner Tube. We