CMTOTWO bike crankset 48T, 170mm aluminum arms with double-layer chain guard and removal tool

CMTOTWO's bike crankset is a complete, universal replacement set (48T/52T) with a double-layer chain guard and 170mm aluminum alloy arms designed for single-speed and 6/7/8-speed electric and fat-tire bikes.

This crankset package includes left and right 170mm aluminum arms, a steel chainring available in 48T and 52T, a robust double-layer plastic chain guard, and a crank removal tool—everything needed to upgrade or replace the drivetrain on many ebikes and commuter bikes. Built for durability and easy installation, the set targets riders who want a lightweight crank arm, reliable chain protection, and compatibility with 9/16" pedals and common bottom bracket setups.

Will this crankset fit my ebike or bicycle?

The CMTOTWO crankset is engineered as a universal option for a broad range of bikes: single-speed, 1/6/7/8-speed city and electric bikes, folding bikes, and fat-tire models. Compatibility depends primarily on pedal thread (9/16") and whether your bike accepts a standard crank arm spindle and chainring mounting.

• Fits bikes using 9/16" pedals and standard crank mounting.
• Designed for single-speed and 1/6/7/8-speed drivetrains.
• Works with many ebikes, city bikes, folding bikes, and fat-tire bikes.
• Includes crank removal tool for easier swap-out on compatible spindles.

How does the double-layer chain guard help daily riding?

The double-layer chain guard protects the chain from debris and helps keep pant legs and clothing clean while riding. Its layered design reduces the chance of the chain slipping off the sprocket and provides added stiffness compared with a single thin guard.

• Prevents chain contact with trousers and reduces grease transfer.
• Stabilizes the chain, lowering risk of derailment from impacts.
• Durable plastic layers resist cracking and are simple to clean.

What materials and durability features does this crankset include?

The crankset combines a steel chainring for wear resistance with lightweight aluminum alloy crank arms for strength without excess weight. The double-layer chain guard is made of reinforced plastic to withstand everyday knocks, and the package includes a removal tool so you can maintain or replace parts with minimal extra tools.

• Chainring: hardened steel for long-term wear resistance.
• Crank arms: 170mm aluminum alloy, corrosion resistant and lightweight.
• Chain guard: two-layer plastic construction for impact resistance.
• Includes a crank removal tool for easier maintenance and installation.

How do I choose between the 48T and 52T chainring options?

The tooth count affects pedaling feel: a 52T chainring gives a higher top speed at the same cadence, while a 48T offers easier acceleration and lower effective gearing for hillier terrain or heavier loads. Choose based on your typical riding conditions and desired cadence range.

• 52T — higher gear ratio for faster cruising on flat roads.
• 48T — lower gear ratio for easier starts, climbs, and heavy loads.
• Both rings are compatible with the supplied crank arms and guard.

Who this is for: Cyclists updating or repairing electric bikes, city commuters, folding-bike owners, and fat-tire riders who need a reliable, universal crankset with strong chain protection will appreciate this CMTOTWO set. It’s especially suited for riders seeking a lightweight aluminum arm, a sturdy steel ring, and a practical double-layer guard to minimize clothing soiling and chain displacement during daily use.