MTB Crank Arm Set 104 BCD Square Taper Mountain Bike Crankset 152mm 165mm 170mm

Recently converted my girlfriend's hybrid road bike to a 1x flat bar gravel bike and couldn't be happier with these cranks. They look amazing and since she's 4'11 she's no longer riding 170mm cranks on an XS (same size cranks I have on my 54 which is crazy). For context I purchased 152mm cranks with 38t chainrings.

These seem like some really good cranks. I converted my drive train to a 1x so the 152mm length gave some weight savings and more pedal clearance vs the set my bike came with. Also wanted the 104bcd style for ease of chainring replacement. As another stated, it is so difficult to find shorter cranks and I'm so glad to come across these as I'm not ready to invest in short cranks that will fit a hollowtech bb. Plus I'm 5'1" and now my heels arent kicking my rear everytime my leg is at the top of the pedal stroke.

This was a good value crank for my son’s Giant TCX 24” cyclocross bike. That bike came with a 32T crankset with normal teeth and was geared too low for my liking and had some chain drops. That crank did NOT have a spider so I had to replace the whole crank rather than just a new chainring.This works well. Fit and finish is at least as good as what Giant supplied OEM. Crank arms are short enough that a kid can use them. Included 36T chainring seems decent and has fine chain retention. If I choose to change it later 104BCD chainrings are easy to find.However, mounting with the 119mm bottom bracket that bike came with pushed the chainline way too far out and gave a wide Q factor. I put a 103mm BB on as a replacement which brought these crank arms tight, but still spinning freely, to the 68mm threaded shell. Chainline looks perfect with the chainring mounted on the inside of the spider aligning with the 4th or 5th gear of the 8 speed cassette. 107-110 may work for other bikes but for me 103 was correct.In short, seems to work well but you may need to play with axle length and chainring mounting location to get a good chainline.

This was a fun 1x upgrade for my kid’s Cannondale 24. It has a ‘SRAM-like’ thick/thin chain ring, which successfully prevents chain derailments. The crank arms have quality threads for pedal install. With “proper” installment it runs smooth, but it is not an ideal design. If you tighten the chain ring bolts to a reasonable level, the teeth of the chain ring push into the spider of the crank arm, which causes the chain to immediately derail. You can see in the photo how the chain rides on the chain ring below the spider. As a result, you can only tighten the bolts “snug” to avoid this issue. I used blue locktight on the bolts to prevent them from backing out and have not had any problems. The crank and chainring arrive detached with no install instructions. The crank also does not come with any bolt covers. The one shown in the photo is from the old crank. So, there are some drawbacks, but I still think it is a good product for a kid’s bike.

It drives me crazy that bike manufacturers send out XS and XXS bikes with cranks for 6-footers! These installed easily on my wife's bike. The chainring can go on either side of the crank so I swapped it to the other side for better chainline alignment.

I just got this today. I installed it and went for a short ride. I've also recently got thinner pedals for power transfer and ground clearance. I was concerned that I may loose leverage going from 175mm to 152mm. However dropping two chain rings seems to make up for it. I feel more powerful and comfortable making smaller circles. I'm thinking about trying a larger chain ring but it feels great. For this price you should give it a shot. My 3x crank also has a 38T ring and I still feel better than using the same gearing.

Banged a pedal into a rock on trail and stripped the pedal out of the crank arm. Got these and they are a perfect fit replacement.

I was looking for shorter (165-mm) crank arms to install on a square taper bottom bracket. These flair out for MTB-style bikes as opposed to being straight. The non-drive side flairs 40-mm, the drive side flairs 37-mm. So while shorter, these also extend the total width making your knees further apart when you pedal.I returned them; not useable for what I wanted. These measurements were not incuded in dimensions and the photos didn't show the amount of flair, so maybe this helps you? If you have an MTB with wide chain stays, these might work.

Muy difícil de encontrar esta medida de bielas para bici de Niño. Esta muy bien y es de aluminio, lo que la hace ligera. Excelente para convertir la bici de mi hijo de 2x8 a 1x10.

This worked great and took just minutes to install (with the right tools). My son really likes the extra small ring gear and didn't notice the slightly longer cranks (from 140 mm to 150 mm).

Good quality and fits well