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BUCKLOS 810025 104 BCD 170 mm Square-Taper Single-Speed Crankset

$38.99 (Price correct as of 11/12/2026 06:39 PST · Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.)

The purple BUCKLOS 810025 is a 170 mm square-taper crankset specified for single-speed use. It has a 104 BCD mounting pattern and a 30T narrow-wide chainring. The stated package includes the crankset, chainring and four chainring bolts. Before selecting it, check that the bike’s drivetrain, square-taper interface, mounting pattern and required crank length match.

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SKU: B08RJKPR6N Category:

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Quick Summary

The BUCKLOS 810025 is a purple mountain bike crankset for single-speed use. It combines 170 mm crank arms, a square-taper interface and a 104 BCD mounting pattern with a 30T narrow-wide chainring. The listing specifies that it cannot be used with other-speed drivetrains.

Key Details

Detail Product information and buyer relevance
Drivetrain Specified for single-speed use only. Match this restriction to the bike’s drivetrain.
Crank arms 170 mm long and made from aluminum alloy; the listed crank weight is 550 g.
Chainring 30T narrow-wide ring with a 104 BCD. The listing identifies it as 7075 aluminum alloy and gives its weight as 37.2 g.
Interface and model Square-taper interface; model 810025, in purple.
Stated package contents One bike crankset, one 30T chainring and four chainring bolts.

Compatibility, Size and Fit

Confirm that the bike uses a single-speed drivetrain and has a compatible square-taper interface. The 104 BCD refers to the chainring’s bolt circle diameter, so check that the mounting pattern matches. The listing does not provide further bottom-bracket or bike-fit details; verify those against the bike’s specifications before choosing this part.

What to Compare Before Buying

  • Drivetrain: This crankset is specified for single-speed use, not other-speed drivetrains.
  • Crank length: Compare the 170 mm arms with the length required for the bike.
  • Mounting fit: Check both the square-taper interface and 104 BCD pattern against the existing setup.
  • Chainring: Confirm that a 30T ring and its narrow-wide profile suit the intended single-speed configuration. The listing says the tooth design can help prevent chain drops; it does not guarantee that a chain will stay on.

Before You Decide

Check the single-speed restriction, 170 mm arm length, square-taper interface and 104 BCD fit. Also confirm that the stated chainring and bolt contents match the configuration you need.

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