Challenge Gravel Grinder TLR Tire - 700 x 42 Top Tube Bags The integrated chain line stabilizer

The integrated chain line stabilizer keeps lateral chain movement in check for more consistent shifting across the cassette or freewheel

The CNC-machined aluminum body is precision-threaded for a secure locknut fit

it uses an overlapping handle design that maximizes pumping efficiency in a compact package

and always bleed the system after any hose work

Apply it to bottom bracket threads

Challenge Gravel Grinder TLR Tire - 700 x 42 Top Tube Bags The integrated chain line stabilizerWhat Makes the Challenge Gravel Grinder TLR Your Go To for Dirt Roads? The Challenge Gravel Grinder TLR is designed for the rider who spends their weekends on mixed terrain, where paved roads give way to hardpack dirt, loose gravel, and everything in between. A file tread center keeps rolling resistance low when the ground is smooth and predictable, while knobbier shoulder tread activates when you lean into loose corners and need the extra bite to