To maximize the life of your bottom bracket bearings, and minimize side-to-side rattle over time, you need a crank preload ring that’s easy to adjust.
And if you need a ring you can easily adjust to any tension — in one of 12 anodized colors from Muc-Off to match its tubeless valves — keep reading.
Muc-Off’s new Crank Preload Rings are compatible with road, gravel, and mountain bikes with 30mm spindle cranks including SRAM, Race Face and Easton. (You can also fudge them onto SRAM DUB 28.99 spindles.) The CNC-machined 7075 aluminum rings weigh 8.2 to 12.7 g, depending on the adaptors you use (claimed, all sizes included with purchase).
What is the point of an adjustable preload ring? Primarily, it’s to allow the user to apply a set force to the crank bottom bracket bearings. That lets the rider determine how much force they’re applying to prevent rattle in the spindle. It also helps keep cranks and bearings from creaking or wearing prematurely.
Stock preload rings are mostly plastic, and manufacturers secure them with a self-tapping screw. That means most people ride rings they can’t precisely tighten or loosen. If you tighten it too much, you’ll snap the plastic and ruin the thread.
Muc-Off’s version costs $40 MSRP, but hey, it will match those valves, right?
