newer style crank for 73mm BSA frame

Discuss light weight issues concerning mountain bikes & parts.

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YourConfused
Posts: 5
Joined: Sat Sep 15, 2018 7:38 am
Location: ATX

by YourConfused

I have a 73mm BSA threaded bottom bracket shell frame and I am trying to figure out what type of new crank/BB setup fits this. I am thinking that the that the 386 evo type may fit but I am not really sure and don't know where to start looking as I haven't upgraded in years. I have some nice, forget the brand, vintage-ish BB, square taper, that has less than stellar bearings in it now. Weight of crank arms, spider, bolts and BB is 600g currently, so I am looking to lighten it up a bit. I ride mainly singletrack so I don't need bomb proof stuff. Any info or thoughts would be appreciated. :D

by Weenie


bm0p700f
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by bm0p700f

That's a fairly light chainset. XT with BB is not much lighter.

YourConfused
Posts: 5
Joined: Sat Sep 15, 2018 7:38 am
Location: ATX

by YourConfused

bm0p700f wrote:
Sun Oct 07, 2018 10:58 am
That's a fairly light chainset. XT with BB is not much lighter.
Thanks for the input.

Probably a waste of money then to bother with an upgrade. Is there a good source of "good" bearings anywhere? I replaced the bearings in fy fisher, press fit 1990's, about 20 yrs ago and they are still amazing bearings. The shop I got them from closed so I am not sure where they came from.

mattr
Posts: 3817
Joined: Fri May 25, 2007 6:43 pm
Location: The Grim North.

by mattr

Any bearing from a decent manufacturer will be fine, I tend to use SKF, as they are local to me.
Get a 2RS type for better sealing.

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