Burgtec Thick Thin Chainring 104mm BCD Inside Fit E-Bike Steel

The Burgtec Thick Thin Chainring in 104mm BCD Inside Fit is the steel e-bike variant built to handle the brutal torque that motors throw at your drivetrain. Where aluminium chainrings can wear quickly under e-bike loads, this steel version holds its teeth longer and keeps your chain exactly where it belongs — even when the trail gets rowdy. Designed specifically for Shimano cranks and paired with a clutch derailleur, this is the chainring upgrade your e-bike needs if chain drops are ruining your rides.

Design Features

• Steel construction — engineered to handle the elevated torque of e-bike motors, offering superior wear resistance over aluminium alternatives
• Thick-thin tooth profile alternates tooth thickness to precisely match chain inner and outer links, dramatically reducing the chance of chain drop
• Inside fit mounting — designed to work directly with Shimano 4-bolt 104mm BCD cranks without spacers or adaptors
• Clutch derailleur compatible — engineered to work in tandem with rear clutch mechanisms for a belt-drive level of chain security on the trail
• Available in 30T, 32T, 34T and 36T to suit a wide range of trail and enduro e-bike gearing setups
• Note: 30T bolt holes are threaded — 8mm x 0.75mm x 8mm long chainring bolts required (sold separately)

Specifications

• BCD: 104mm
• Material: Steel
• Mounting: Inside fit
• Sizes: 30T, 32T, 34T, 36T
• Compatibility: Shimano 4-bolt cranks, clutch derailleurs
• Bolt spec (30T only): 8mm x 0.75mm x 8mm long chainring bolts