GONOG is a go-no-go gauge that helps frame builders layout chain stays, and check crank and chainring clearances. It is available in Shimano and SRAM versions, each with crank and chainring marks for common road, gravel and MTB configurations. The GONOG indexes off of the bottom bracket shell with offsets based on 68mm (road, gravel) and 73mm (mountain) shell widths. The GONOG has a small hole for hanging (not shown).
Shimano (Dura-Ace, GRX 1x, GRX 2x, XTR 1x Boost) SRAM (Red 2x, Force 1x, XX1 1x, XX1 1x Boost)
12" x 4"