Extra machining shaves 1 ounce from original design without sacrificing any strength. This will be the truest running gear you have ever used. Machined with tighter tolerances than the competition to ensure a snug fit on the spider, which keeps the gear running true and helps eliminate tight spots.
Compatible with 104mm 4 bolt cranks. (Does not fit Profile 4 bolt spiders)
Jeff Upshaw's gear of choice!