A few facts about REN Cycles are no secret: an affinity for cyclocross and adventure bikes, a passion for single speed racing, and a love of belt drive gearing.
The REN IVAN, a convertible dropout update of the legendary Ti Cycles STEILACOOM race bike and the official bike of the infamous 2010 SSCXWCXPDX event, was designed specifically for PacNW SS icon Seth Patla to run a Gates Carbon Drive setup. (Seth has since used the bike to repeat win SS categories at Sea Otter Classic, Oregon CX Grand Prix Series, and the Oregon Best All-around Racer points tally).
Paragon Rocker Dropouts are the REN dropout of choice; by keeping the axle inside the frame's rear triangle rockers provide much more rear end stability than horizontal sliders, while at the same time remaining simple and elegant with a simple two-bolt attachment.
Once the PDXTI Rockerbone resolved the conundrum of tensioning a belt drive without an integral set screw the lightweight, simple, and elegant Rocker Drop was nearly perfect. The final detail that needed to be aced was the ability to run any rotor size or axle configuration available. Until now Paragon offered an ISO mount for 140mm rotors in Quick Release only, with the post- style caliper mount standard on 142x12 Thru Axle inserts limiting riders to a 160mm or larger rotor.
A few observant social media followers noticed that the 142x12 ISO Rocker Inserts for 140mm rear rotors have been available on REN IVAN frames for most of 2017. As of January 2018 this versatile part, which is interchangeable with other Paragon Rocker Dropout inserts, is also available for aftermarket purchase here.