Are you looking for the best mountain bike crank arms to enhance your riding experience? We offer a carefully selected guide featuring top crank arms to help you find the perfect match for power and control on every trail.
Mountain biking is all about power and control. The right crank arms make a big difference. They turn your effort into smooth, steady motion.
Choosing the best crank arms can feel tricky. But we’ve done the work for you. Our guide highlights top picks for every rider.
Whether you’re climbing hills or racing trails, the perfect crankset is here. Let’s find your ideal match and boost your ride!
List of Top 10 Mountain Bike Crank Arms
| Image | Title | Best For | Price |
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THALOUS Bicycle Crankset 6 7 8 Speed 42/34/24T Universal Square Crank Set 170MM Crank Arm for Mountain Bike |
This crankset is perfect for riders who want smooth shifts and strong parts on their bike. It suits anyone who needs a light, durable, and easy-fit upgrade for daily rides. |
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Relwears Bike Crankset FC-TY301 42-34-24T for 3×6/7/8 Speed Gears Square Taper Set 170MM Crank Arm for Mountain Bike |
This crankset is perfect for mountain riders who want smooth, easy shifts and a strong, light setup. It suits anyone who needs reliable power and simple use on 3×6, 3×7, or 3×8 bikes. |
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PETCHOR Square Taper Crankset MTB, Mountain Bike Single Speed Crankset, Bicycle Crank Arm Set 170mm 104BCD, 32T Chainring & Bolts |
This PETCHOR Square Taper Crankset is perfect for single-speed mountain bike riders who want a lightweight, durable upgrade. It’s ideal for those seeking better chain retention and a comfortable ride. |
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WEEROCK Mountain Bike Crankset Aluminium Alloy 1 Piece/Single 42T Charing Crank Set with 170mm Arm 104 BCD, Compatible with Single Speed Bicycle and 6/7/8/9/10/11 Speeds MTB Bike, Golden |
This WEEROCK Mountain Bike Crankset is perfect for riders who want a lightweight, durable, and versatile upgrade. It’s ideal for single-speed bikes and MTBs with 6-11 speeds, offering smooth performance and chain security for safer rides. |
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WEEROCK Mountain Bike Crankset Aluminium Alloy 1 Piece/Single 42T Charing Crank Set with 170mm Arm 104 BCD, Compatible with Single Speed Bicycle and 6/7/8/9/10/11 Speeds MTB Bike,Purple |
This crankset is perfect for riders who want a light, strong, and safe setup for their bike. It suits anyone who wants smooth power on a single speed or multi‑speed MTB. |
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Relwears Bike Crankset 42-34-24T for 3×7/8/9 Speed Gears Square Taper Set 170MM Crank Arm for Mountain Bike |
This crankset is perfect for mountain riders who want smooth shifts and strong power on tough trails. It suits anyone who needs easy climbs, steady control, and a durable setup for daily rides. |
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LXFNDZW Mountain Bike Crank Arm 170mm Left Square Taper Replacement Bike Crank | Forged Alloy Durable Bike Components | Compatible with Standard Square Spindle Bottom Bracket |
This LXFNDZW Mountain Bike Crank Arm is perfect for cyclists and home mechanics who need a reliable, easy-to-install replacement part. It’s ideal for fixing or upgrading mountain, road, folding, or fixed-gear bikes with a standard square taper bottom bracket. |
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BNVB Bike Crank Arm Set， 170mm 105 BCD Mountain Bike Crank Set with Bottom Bracket Crank and Chainring Bolts for MTB BMX Road Bicyle, Compatible with Shimano, FSA, Gaint (Black) |
This set is perfect for MTB, BMX, and road riders who want a light, strong, and easy‑to‑install crank upgrade. It suits anyone who wants better control and a smooth ride. |
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WEEROCK Mountain Bike Crankset 1 Piece/Single 32T Charing Crank Set with 170mm Arm for Bicycle MTB, Compatible with Single Speed Bicycle and 6/7/8/9/10/11 Speeds Bike |
This WEEROCK Mountain Bike Crankset is perfect for riders who want a strong, lightweight, and rust-resistant upgrade. It’s ideal for single-speed bikes and works with 6 to 11-speed bikes, making it great for all cycling levels. |
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BOLANY Mountain Bike Crankset MTB 1x Square Taper Crankset 104 BCD 170mm Crank 32/34/36T Compatible with Single Speed Bicycle |
This crankset is perfect for mountain riders who want a light, strong, and smooth setup. It suits anyone who wants better speed, easy power, and a tough build that lasts. |
Detailed Reviews
Discover the top 10 Mountain Bike Crank Arms in this expert-reviewed guide. Each product is handpicked for performance, durability, and value. Whether you seek comfort, speed, or affordability, this guide has you covered. Find the perfect fit for your ride and upgrade with confidence.
1. THALOUS Bicycle Crankset 6 7 8 Speed 42/34/24T Universal Square Crank Set 170MM Crank Arm for Mountain Bike
The THALOUS Bicycle Crankset gives your ride smooth, steady power. It fits 6, 7, and 8‑speed setups with ease. The 170mm crank arms feel light and strong on every turn.
Its forged aluminum alloy build keeps weight low and strength high. Shifting stays clean and accurate thanks to its precise design. It works well with many bike types.
Setup is simple. Use it on many bikes. Enjoy a solid, smooth ride.
| Pros | Cons |
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Perfect For:
This crankset is perfect for riders who want smooth shifts and strong parts on their bike. It suits anyone who needs a light, durable, and easy-fit upgrade for daily rides.
Ready to Purchase?
2. Relwears Bike Crankset FC-TY301 42-34-24T for 3×6/7/8 Speed Gears Square Taper Set 170MM Crank Arm for Mountain Bike
The Relwears Bike Crankset FC‑TY301 gives your ride smooth power. It fits 3×6, 3×7, and 3×8 speed bikes. It works with 170mm crank arms for easy control.
The aluminum alloy build is light and strong. The DUAL SIS shifting stays quick and steady.
You get wide gear range for simple climbs. You get clean, fast setup. You get two dust caps included for easy use.
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Perfect For:
This crankset is perfect for mountain riders who want smooth, easy shifts and a strong, light setup. It suits anyone who needs reliable power and simple use on 3×6, 3×7, or 3×8 bikes.
Ready to Purchase?
3. PETCHOR Square Taper Crankset MTB, Mountain Bike Single Speed Crankset, Bicycle Crank Arm Set 170mm 104BCD, 32T Chainring & Bolts
This MTB crankset uses strong aluminum alloy. It is lightweight for easy riding. The black finish will not fade.
The narrow wide teeth hold your chain well. This set fits many bikes.
The crank arms are long and strong. You get a full kit today. It is easy to install.
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Perfect For:
This PETCHOR Square Taper Crankset is perfect for single-speed mountain bike riders who want a lightweight, durable upgrade. It’s ideal for those seeking better chain retention and a comfortable ride.
Ready to Purchase?
4. WEEROCK Mountain Bike Crankset Aluminium Alloy 1 Piece/Single 42T Charing Crank Set with 170mm Arm 104 BCD, Compatible with Single Speed Bicycle and 6/7/8/9/10/11 Speeds MTB Bike, Golden
The WEEROCK Mountain Bike Crankset is a durable, lightweight upgrade for your ride. Made from aluminum alloy, it weighs just 0.75kg (1.65lb), making it both sturdy and rust-free. Perfect for single-speed bikes and MTBs with 6-11 speeds.
Drop Stop Design keeps your chain secure. The 104 BCD chainring allows easy disc replacement. Golden finish adds style to your bike.
This 42T crankset with a 170mm arm fits folding bikes too. It’s a reliable, advanced choice for safer cycling. Upgrade your ride with WEEROCK today!
| Pros | Cons |
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Perfect For:
This WEEROCK Mountain Bike Crankset is perfect for riders who want a lightweight, durable, and versatile upgrade. It’s ideal for single-speed bikes and MTBs with 6-11 speeds, offering smooth performance and chain security for safer rides.
Ready to Purchase?
5. WEEROCK Mountain Bike Crankset Aluminium Alloy 1 Piece/Single 42T Charing Crank Set with 170mm Arm 104 BCD, Compatible with Single Speed Bicycle and 6/7/8/9/10/11 Speeds MTB Bike,Purple
This purple crankset is strong. It uses tough alloy. It fits many MTB bikes.
The single 42T ring works well. The 170mm arm feels smooth.
It fits 104 BCD parts. This bike part lasts long.
| Pros | Cons |
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Perfect For:
This crankset is perfect for riders who want a light, strong, and safe setup for their bike. It suits anyone who wants smooth power on a single speed or multi‑speed MTB.
Ready to Purchase?
6. Relwears Bike Crankset 42-34-24T for 3×7/8/9 Speed Gears Square Taper Set 170MM Crank Arm for Mountain Bike
This crankset is strong and light. It gives smooth power on every ride.
The aluminum alloy build keeps weight low. The square taper design adds firm strength. The 170mm arms fit many bikes.
The 48.5mm chain line keeps shifts clean. The 24/34/42T rings handle steep climbs. The 7–9 speed setup works with many gear systems.
| Pros | Cons |
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Perfect For:
This crankset is perfect for mountain riders who want smooth shifts and strong power on tough trails. It suits anyone who needs easy climbs, steady control, and a durable setup for daily rides.
Ready to Purchase?
7. LXFNDZW Mountain Bike Crank Arm 170mm Left Square Taper Replacement Bike Crank | Forged Alloy Durable Bike Components | Compatible with Standard Square Spindle Bottom Bracket
Upgrade your ride with the LXFNDZW Mountain Bike Crank Arm. This 170mm left crank arm is a versatile replacement for many bike types.
Made from premium steel, it’s built to last. The square taper design ensures easy installation, so you can get back on the road quickly.
Wide compatibility, durable construction, and performance-enhancing quality make this crank arm a must-have for any cyclist’s toolkit.
| Pros | Cons |
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Perfect For:
This LXFNDZW Mountain Bike Crank Arm is perfect for cyclists and home mechanics who need a reliable, easy-to-install replacement part. It’s ideal for fixing or upgrading mountain, road, folding, or fixed-gear bikes with a standard square taper bottom bracket.
Ready to Purchase?
8. BNVB Bike Crank Arm Set， 170mm 105 BCD Mountain Bike Crank Set with Bottom Bracket Crank and Chainring Bolts for MTB BMX Road Bicyle, Compatible with Shimano, FSA, Gaint (Black)
The BNVB Bike Crank Arm Set is a lightweight and durable upgrade for your bike. Made from high-strength aluminum alloy, it weighs just 675g, making it perfect for riders seeking better control.
This crank set features an ergonomic design, ensuring a comfortable and efficient ride. Its 170mm crank arm length and 104mm BCD fit most mountain bikes and dirt bicycles.
Installation is simple and quick, with compatibility for brands like Shimano, FSA, and Gaint. The package includes all essential parts, such as a bottom bracket and chainring bolts, for a hassle-free setup.
| Pros | Cons |
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Perfect For:
This set is perfect for MTB, BMX, and road riders who want a light, strong, and easy‑to‑install crank upgrade. It suits anyone who wants better control and a smooth ride.
Ready to Purchase?
9. WEEROCK Mountain Bike Crankset 1 Piece/Single 32T Charing Crank Set with 170mm Arm for Bicycle MTB, Compatible with Single Speed Bicycle and 6/7/8/9/10/11 Speeds Bike
This crankset is strong, light, and built to last. The 32T steel chainring gives solid power. The drop stop design keeps your chain in place.
It fits single speed and 6–11 speed bikes with ease. The 170mm alloy arm is light and tough. The whole set weighs only 0.7KG.
Ride with smooth force. Ride with safe control.
| Pros | Cons |
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Perfect For:
This WEEROCK Mountain Bike Crankset is perfect for riders who want a strong, lightweight, and rust-resistant upgrade. It’s ideal for single-speed bikes and works with 6 to 11-speed bikes, making it great for all cycling levels.
Ready to Purchase?
10. BOLANY Mountain Bike Crankset MTB 1x Square Taper Crankset 104 BCD 170mm Crank 32/34/36T Compatible with Single Speed Bicycle
The BOLANY Mountain Bike Crankset is made for a smooth and fast ride. Its 7075 aluminum alloy build helps keep it light and strong.
The 104 BCD design gives a clean fit for single speed use. Choose 32T, 34T, or 36T for the gear feel you want.
It is built to last. It helps you ride better. It keeps power steady.
| Pros | Cons |
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Perfect For:
This crankset is perfect for mountain riders who want a light, strong, and smooth setup. It suits anyone who wants better speed, easy power, and a tough build that lasts.
Ready to Purchase?
Buying Guide
Mountain biking is all about power and control. The right crank arms turn your effort into a smooth, steady ride.
Choosing the best crank arms can feel tricky. But we’ve made it easy with this guide. Let’s find your perfect match and boost your ride!
Here’s what to consider when buying:
- Material: Look for aluminum alloy or steel. They’re light and strong, perfect for tough trails.
- Length: 170mm is common. It gives good control and fits most riders.
- Compatibility: Check if it fits your bike’s speed and bottom bracket.
- Chainring Size: Choose 32T, 42T, or others based on your riding style.
- Design: Narrow-wide teeth keep the chain secure. Drop stop adds extra safety.
- Weight: Lighter cranks make climbing easier. Aim for under 1kg.
- Durability: Go for rust-free and fade-resistant finishes for long-lasting use.
- Installation: Pick cranks that are easy to install with included parts.
With these tips, you’ll find the ideal crank arms for your ride. Happy trails!