Burgtec Thick-Thin Direct Mount Chain Ring - SRAM Direct Mount - 3mm Boost - Round - Kash Bronze - 9-12 Speed - 30T Envelope Shipping ISEV-ISB is for a Shimano

ISEV-ISB is for a Shimano I-SPEC EV shifter mounting to a Shimano I-SPEC B brake

A2 Spec has no marking at the top of the stanchion and the speed adjuster knob is black (vs Silver for the A1)

Equipped with Lezyne's ABS Flex Hose (which stores neatly in side the handle) and featuring an overlapping handle and barrel the Pressure Drive V2 stores away nice and small when not in use

not-too-snug fit

Sublimated fade resistant graphics

Burgtec Thick-Thin Direct Mount Chain Ring - SRAM Direct Mount - 3mm Boost - Round - Kash Bronze - 9-12 Speed - 30T Envelope Shipping ISEV-ISB is for a ShimanoKeep that chain in place where it should be with a Burgtec Thick Thin Chain Ring. Designed with a proven thick thin tooth profile for improved chain retention. Who's this item for: Riders who use 1x drivetrains and are looking for superior chain retention as well as durability. Weight: 0. 08g Pros: Wide range of tooth options. Works for 9, 10, 11, and 12 speed setups. Great build quality. Cons: Oval options not available in all mounting types.