--- product_id: 48560663 title: "FOMTOR Bicycle Crank Arm Set 104 BCD Road Mountain Bike Crankset with Bottom Bracket and Chainring bolts 170mm Crank Arm" brand: "fomtor" price: "$125.77" currency: USD in_stock: true reviews_count: 13 category: "Fomtor" url: https://www.desertcart.us/products/48560663-fomtor-bicycle-crank-arm-set-104-bcd-road-mountain-bike store_origin: US region: United States of America --- # 170mm crank arm length for optimal leverage Includes bottom bracket & chainring bolts for seamless install 104mm BCD fits versatile chainring setups FOMTOR Bicycle Crank Arm Set 104 BCD Road Mountain Bike Crankset with Bottom Bracket and Chainring bolts 170mm Crank Arm **Brand:** fomtor **Price:** $125.77 **Availability:** ✅ In Stock ## Summary > 🚴‍♂️ Elevate your ride with power and precision – don’t get left behind! ## Quick Answers - **What is this?** FOMTOR Bicycle Crank Arm Set 104 BCD Road Mountain Bike Crankset with Bottom Bracket and Chainring bolts 170mm Crank Arm by fomtor - **How much does it cost?** $125.77 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/48560663-fomtor-bicycle-crank-arm-set-104-bcd-road-mountain-bike) ## Best For - fomtor enthusiasts ## Why This Product - Trusted fomtor brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **All-in-One Upgrade Kit:** Comes complete with bottom bracket, chainring bolts, and crankset bolts for hassle-free installation. - • **Universal Compatibility:** Fits single, double, and triple chainrings (9S-11S) plus popular brands like FSA and Giant. - • **Optimized for Every Ride:** Perfect for mountain, road, folding, and BMX bikes—your go-to crankset for all terrains. - • **Precision Power Transfer:** 170mm crank arms engineered for maximum pedaling efficiency and control. - • **Durable Forged Construction:** Robust red anodized finish ensures long-lasting performance and standout style on any ride. ## Overview The FOMTOR Bicycle Crank Arm Set features a 170mm crank arm length and 104mm BCD, compatible with 9 to 11-speed drivetrains and major brands like FSA and Giant. This all-inclusive kit includes a bottom bracket and chainring bolts, designed for mountain, road, folding, and BMX bikes. Its forged construction and vibrant red finish combine durability with eye-catching style, making it a versatile upgrade for serious cyclists. ## Description Shop FOMTOR Bicycle Crank Arm Set 104 BCD Road Mountain Bike Crankset with Bottom Bracket and Chainring bolts 170mm Crank Arm (Red). Free delivery and returns on all eligible orders. Review: So far so good! - I bought this to replace my outdated square taper BB and crankset that recently died on my MTB, 90% of my riding is done on my road bike so I needed something cheap and easy for my mountain bike. Upon opening the parts were all well packaged, and after inspecting them, all seemed pretty solid, the BB is near enough identical to a Shimano Hollowtech ii maybe along the same lines as a Claris or Sora model. The crank arms are robust and a little heavier than expected but that’s not a big deal. Extras include the chainring bolts and bb spacers. I fitted the bb and luckily didn’t need to to fit any spacers, I fitted my existing chainring to the crank spider and everything felt solid and the chain ran straight after tightening everything up. I tested it on a quick ride mixing up smooth tarmac, gravel tracks and some rocky downhill single track and it performed fantastically, the cranks feel solid and stiff, the previous square taper always seem to feel a bit spongy. Obviously I know that time will tell, and I will update my review in a few weeks/months will further info. But as it stands this is a real value for money purchase, you could spend £40/50 more on an official Shimano/SRAM product but you won’t go wrong here at all. Definitely worth an investment if you don’t want to spend too much, as buying unbranded Chinese stuff can be a gamble but it paid off for me! As I said before I’ll return with a further update after a few weeks of riding but all seems well at the moment! ***UPDATE*** So 2 months in and it’s still running perfectly! I was expecting the BB to go first but it’s still as smooth as ever, I’ve been on multiple XC rides through both wet and dry conditions as well as rough terrain, I also commute to work 4 times a week using the same bike so it’s had a whole load of use and yep, it’s perfect. I can thoroughly recommend this crankset it’s practically faultless considering it’s unbranded. The cranks are rock solid and can take a huge beating, the BB I’m still preparing to replace as it’s obviously not an official Shimano, but a Deore replacement is only about £10-£12. Review: Incredible Cranks For any price - Incredibly light and very tough. These use the same patented design as Shimano Deore-XT 2015 triple chain-set cranks so are very high quality. The BB seems tough and is very smooth.You could partner this to a 7075 alloy chain-ring and then you would have a very light setup. I used this for my single speed setup and after slightly adjusting the chain-line this brought the weight of my bike from just over 11.25kg to sub 11kg. They are very stiff so if you are used to carbon cranks these would probably be an apt budget replacement. I got these in an anodised red colour and the finish is immaculate. These cranks perform similarly to raceface Turbine cranks which are worth around £150. ## Features - BCD:104mm.Crank Arm length 170mm，Crank related holes distance 74mm - With Bottom Bracket. Bottom Bracket Diameter 23.79mm. B.B BSA:68~73mm - Compatible: single disc, double disc, three disc 9S 10S 11S crankset, FSA, Giant ATX770 ATX770-D XTC 750 bike - Suit for Mountain Bike, Road bike, Folding bike, MTB, BMX - Package Include: one fordged Crank set,Bottom Bracket,4 pcs single chainring bolts(set) ,and crank screw, crankset bolt Allen Wrench. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B075F6TVPD | | Batteries included? | No | | Best Sellers Rank | 130,031 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 235 in Cranksets for Bikes | | Brand | FOMTOR | | Color | Red | | Customer Reviews | 4.4 4.4 out of 5 stars (322) | | Date First Available | 5 Sept. 2017 | | Is discontinued by manufacturer | No | | Manufacturer | FOMTOR | | Package Dimensions | 27.4 x 18.5 x 10.1 cm; 980 g | ## Images ![FOMTOR Bicycle Crank Arm Set 104 BCD Road Mountain Bike Crankset with Bottom Bracket and Chainring bolts 170mm Crank Arm - Image 1](https://m.media-amazon.com/images/I/61p-mBC6SdL.jpg) ## Available Options This product comes in different **Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ So far so good! *by B***5 on 5 June 2020* I bought this to replace my outdated square taper BB and crankset that recently died on my MTB, 90% of my riding is done on my road bike so I needed something cheap and easy for my mountain bike. Upon opening the parts were all well packaged, and after inspecting them, all seemed pretty solid, the BB is near enough identical to a Shimano Hollowtech ii maybe along the same lines as a Claris or Sora model. The crank arms are robust and a little heavier than expected but that’s not a big deal. Extras include the chainring bolts and bb spacers. I fitted the bb and luckily didn’t need to to fit any spacers, I fitted my existing chainring to the crank spider and everything felt solid and the chain ran straight after tightening everything up. I tested it on a quick ride mixing up smooth tarmac, gravel tracks and some rocky downhill single track and it performed fantastically, the cranks feel solid and stiff, the previous square taper always seem to feel a bit spongy. Obviously I know that time will tell, and I will update my review in a few weeks/months will further info. But as it stands this is a real value for money purchase, you could spend £40/50 more on an official Shimano/SRAM product but you won’t go wrong here at all. Definitely worth an investment if you don’t want to spend too much, as buying unbranded Chinese stuff can be a gamble but it paid off for me! As I said before I’ll return with a further update after a few weeks of riding but all seems well at the moment! ***UPDATE*** So 2 months in and it’s still running perfectly! I was expecting the BB to go first but it’s still as smooth as ever, I’ve been on multiple XC rides through both wet and dry conditions as well as rough terrain, I also commute to work 4 times a week using the same bike so it’s had a whole load of use and yep, it’s perfect. I can thoroughly recommend this crankset it’s practically faultless considering it’s unbranded. The cranks are rock solid and can take a huge beating, the BB I’m still preparing to replace as it’s obviously not an official Shimano, but a Deore replacement is only about £10-£12. ### ⭐⭐⭐⭐⭐ Incredible Cranks For any price *by N***U on 28 April 2018* Incredibly light and very tough. These use the same patented design as Shimano Deore-XT 2015 triple chain-set cranks so are very high quality. The BB seems tough and is very smooth.You could partner this to a 7075 alloy chain-ring and then you would have a very light setup. I used this for my single speed setup and after slightly adjusting the chain-line this brought the weight of my bike from just over 11.25kg to sub 11kg. They are very stiff so if you are used to carbon cranks these would probably be an apt budget replacement. I got these in an anodised red colour and the finish is immaculate. These cranks perform similarly to raceface Turbine cranks which are worth around £150. ### ⭐⭐⭐⭐ decent enough *by T***K on 8 June 2021* First test ride on my gravel but already noticed some clicking, however it turned out to be the seat post. Cranks seem decent quality but a bit heavy. will see if the BB will be OK over time, so far its fine. I wish I had bought the version with chainring as the one I bought separate didn't match the profile of the cranks. Not a big deal though. ## Frequently Bought Together - FOMTOR Bicycle Crank Arm Set 104 BCD Road Mountain Bike Crankset with Bottom Bracket and Chainring bolts 170mm Crank Arm (Red) - KMC Unisex - Adult X9SL Ti-N X9 SL 9 Speed Chain, 114 Links - Chainring 104 BCD 32T 34T 36T 38T Narrow Wide Single Chain Ring with 4 Pieces Sprocket Bolts for Road Bikes, Mountain Bikes, BMX MTB Bike --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/48560663-fomtor-bicycle-crank-arm-set-104-bcd-road-mountain-bike](https://www.desertcart.us/products/48560663-fomtor-bicycle-crank-arm-set-104-bcd-road-mountain-bike) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-29*