Hello,

First off, I have a Walmart bike, older series Mongoose Pro. I have upgraded many things, the Wheels, Tires, freewheel, chain. The last thing I want to upgrade is the Crankset, I want something built of more quality. Currently the crankset is a suntour.

I had a couple of questions, I have a bike mechanic that helps me at my LBS and he told me that my crank was bent and told me to shop around for another crankset. IDK much about cranksets, I told him what measurement or other things should I look for when searching. He told me any mountain bike crankset that has a square tapered thing.

So... I look for cranksets and I find this one, https://www.jensonusa.com/store/produ...t.aspx?sc=FRGL

It has the option of a square taper or splined, so I guess if I were to buy this crankset I would choose the square taper option right?
Can someone tell me if this crankset would work with my bicycle? Measure wise?

This Crankset doesn't come with a Bottom Bracket, so.. I was wondering how do I search for a bottom bracket? Which would be best for this Crankset? When searching is there some sort of size or measurement I should be looking for? Does the BB have to be a shimano BB since its a shimano crank?

I'm sorry I am such a noob, but I would love to learn this stuff.

Thanks.


BTW, while people say never to upgrade walmart bikes, the reason I am upgrading this bike and not buying a more quality bike is I love the way this bike FITS me. Everything feels comfortable, I would say I love the way the frame fits me. Sure the frame is heavy as sin, but I just love how the bike fits me.

Go with a slx shimono crank

Yeah that model is fine. But if you're changing the bottom bracket as well you should consider getting the splinned version (Octalink V2), and it's best to stay with the same brand Shimano BB and crankset (both square taper or Octalink V2). BB's usually come with spacers for the different lengths.

https://www.jensonusa.com/store/produ...kset+M510.aspx

In the octalink plus it allows for the chainrings to be replaced.

Or this, which has the BB included.

https://www.jensonusa.com/store/produ...+Crankset.aspx

The one you posted should be great for your needs. Another option that would probably work for you if you want to keep things really cheap would be to just post a WTB ad on your local CL bike section. I've done this a few times when I needed a bike part and found I get a few responses within a day or two for what I need, and generally for cheap. There are a lot of bike flippers out there with garages full of spare parts like crank-sets that they'll happily let go for cheap since they pull spares off of bikes that they flip/part/etc. Just make a posting in the bicycle FS section with "WTB: MTB crank-set" in the title and then just let them know what you're looking for in the posting and I bet you'll come up with something.