Wholegrain Cycles, JACK the Bike Rack (Front Rack)JACK lets you carry more things on your bike. It requires no tools to fit and securely attaches to bikes with a handle bar diameter of 22. 2, 25. 4 and 31. 8mm. Its quick and easy to attach and remove so you can swap it from bike to bike. Please have a look at the compatibility diagrams and FAQs page to make sure JACK fits your bike before you purchase. JACK is made from solid 304 Stainless steel and comes with two adjustable length bungees (1. 2m)