Burgtec Oval Thick Thin Chainring 96/64mm BCD XT/XTR

If you've ever wondered whether an oval chainring is worth the hype, Burgtec has done the hard work for you. Through extensive prototyping and on-trail testing, they landed on 115° of ovality as the sweet spot — enough to shrink the dead spot at the top and bottom of your pedal stroke without sacrificing the chain retention and silence that Thick Thin is known for. The result is a ring that keeps you in the power phase longer on every revolution, leveraging the larger muscle groups that drive the downward stroke. Machined from 7075 aluminium for Shimano XT and XTR cranks with 96/64mm BCD, this is a direct, no-compromise upgrade for trail and enduro riders chasing more out of every pedal stroke.

Design Features

• 115° of ovality — dialled in through extensive prototype testing to maximise power-phase time without dead-spot overload
• Thick Thin tooth profile with mud bleed channels — flawless chain retention in all conditions, from dry hero dirt to deep winter mud
• 10, 11 and 12-speed compatible — works with your current drivetrain without compromise
• Fully CNC machined from 7075 aluminium — lightweight, stiff and built to handle sustained trail abuse
• Oval geometry reduces effective dead spot by shortening the top and bottom of the power curve, getting you back into the drive phase sooner on each rotation
• Available in 30T and 32T — Burgtec recommends matching the tooth count to your current round ring for a seamless transition

Specifications

• BCD: 96/64mm (4-bolt, Shimano XT/XTR compatible)
• Material: 7075 aluminium
• Tooth profile: Thick Thin with mud bleed
• Chain compatibility: 10, 11 and 12-speed
• Ovality: 115° (measured from top centre)
• Available sizes: 30T, 32T