Best Bike Cranksets for Oval/Round Chainring Configurations (2026)

Selections were based on 104BCD compatibility, crank arm length options (notably 170mm), square-taper vs other spindles, user ratings, and overall price-to-feature value for mountain-bike use

Top Picks

1
BUCKLOS 170mm MTB Crankset with 104BCD chainrings

BUCKLOS • ★ 4.0/5 • Budget

BUCKLOS crankset for mountain/commuter/e-bike bikes with 104 BCD, available in 32/34/36/38/40/42T. Lightweight and durable with 609g weight. One customer notes improved performance with oval chainring
- 104 BCD ultralight crankset
- available in multiple chainring sizes
- suitable for various bike types
Check current price on Amazon →
2
BUCKLOS 170mm MTB Square Taper Crankset with 104BCD Chainrings

BUCKLOS • ★ 4.0/5 • Budget

BUCKLOS 104 BCD crankset in 170mm with 32/34/36/38/40/42T options. Lightweight and durable for mountain, commuter, and e-bike setups. Users note good value and easy installation, some report chain drops and mixed durability
- 104 BCD ultralight crankset
- includes 32/34/36/38/40/42T options
- fits various bike types (mtb, commuter, e-bike)
Check current price on Amazon →
3
BUCKLOS MTB Crankset 170mm 104BCD with 32/34/36/38/40/42T rings

BUCKLOS • ★ 4.0/5 • Mid-Range

Bucklos 170mm crankset with 104BCD offers lightweight durability for mountain, commuter, and electric bikes. Features round/oval chainrings and multiple tooth options for versatile gearing
- 104 BCD ultralight crankset
- multiple chainring sizes
- fits ebike/commuter bikes
Check current price on Amazon →

Buying Guide

Confirm chainring bolt circle diameter (BCD)

Most options here use 104BCD—verify your chainrings and spider match 104mm BCD to ensure direct compatibility without adapters

Choose oval vs round chainring intent

Select a crankset that accommodates the chainring shape you prefer; many 104BCD cranksets accept either oval or round chainrings of the same tooth count

Match crank arm length to rider and bike

Crank lengths like 170mm are common for MTB setups—pick a length that suits your leg length and pedaling biomechanics to avoid knee strain

Check spindle and bottom bracket interface

Square-taper cranksets require a compatible square-taper bottom bracket, so confirm spindle type before purchase or plan for a matching BB upgrade

Prioritize build quality and weight for intended use

For trail or off-road use, look for durable construction and acceptable weight trade-offs; budget-friendly 104BCD cranksets can offer solid durability for recreational MTB riding