Just finished my Christmas project... Always wanted to try a Slingshot Frame, but it's inventor created the ERB (Energy Return Bike) with a different pivot point than Slingshot which looks like an improvement so I picked up a new frame for $300 and threw on some premium parts as a single speed build... The frame is as heavy as a full-suspenion so the build came in at 22.6lbs with a heavy front tire and suspension seatpost I had laying around. It would be 22.0 lbs with a lighter front tire and conventional seatpost and would be 19.5 lbs with a 3.0lb carbon frame (which may come next for these parts), but I want to try out this "Energy Return Concept" first in the name of Science! After the back wheel hits a bump and pivots up the cable attached to a spring mounted near the head tube pulls the wheel forward for an inch-worming forward effect - we'll see if it works, but feels pretty good jumping curbs as a test ride this morning! I laced up a White Industries ENO eccentric hub for chain tension to a Stan's Crest 650b rim. The rear 650b 2.0 tire fits this 26" frame design. I'm also using a 90mm 29er Cannondale Lefty but I had to cut the headtube down from 6" to 5.5" for the XL Lefty crown spacing to work. I took about 1/4" from the top and bottom of the headtube so the 29er fork doesn't mess up the steering geometry too much - steering feels very nice! Bottom Bracket height is 13.5". The SRAM XX1 crank and the Magura MT8 Carbon Brakes are works of ART! I'm running 32 x 20 for starters which tops out in the 13 to 14mph range. Need better weather to hit the local trails in Brown County State Park Indiana for a real test ride - Can't wait! Enjoy the Freak Bike pics!
Results 1 to 9 of 9