Replacement cranks

[Danm89]

I need to replace the cranks on my bike as the left one has stripped the pedal threads but the actual pedal is fine. I dont know how , i bought it used everything else on it was spot on but didnt spot it when i bought the bike as it was wedged on. Struggling to find a suitable set of cranks in my budget. I have a diamondback heist 2 with a 1x setup and 175mm crank arms. It is none boost. I was going to reuse the chainring but cant find just a set of cranks that are 175mm that are not square taper or out of budget. I can get a shimano deore m617 crankset cheap, can i just take the rings off and put mine single one on there?
Or should i get a set of square taper arms and a new BB for the same price? If i do this i see that the UN55(is that the right one) comes in different lengths how do i determine which one is correct for my bike to match chain line ect? I know about the shell width but not about the spindle length as its got an external BB fitted at moment.

 

[Cycleops]

I imagine you have a Hollowtech bb at the moment so wouldn't be a good idea to go to a square taper. Find a chainset with the same spider as yours and change the ring over?

 

[Danm89]

The shimano deore m617 has the same bolt spacing but it has 2 rings on. Is it as simple as take them off and put mine on? Or would it badly affect the chainline or anything? and how would i get around that?.

 

[Milkfloat]

Can you find shorter cranks, I would not be concerned about having to have 175mm cranks, anything 170 or above would be fine.

 

[Cycleops]

The chain line shouldn't be an issue as it can't be substantialy different. You should look at some of the chain line issues with some 11 speed set ups.

 

[Sharky]

Try having the crank repaired by a firm like this one:-
https://highpath.co.uk/

 

[Sharky]

Also try SJS Cycles for just a replacement left crank
https://www.sjscycles.co.uk/cranks-left/

 

[Cycleops]

A repair as suggested by @Sharky would be a good option but if you did decide to get a new Hollowtech crankset the bonus is it comes with bearings which you can use later.

 

[si_c]

I'd just get a dedicated 1x chainset - something like this would work well.

https://www.merlincycles.com/shimano-m7000-slx-chainset-11-speed-95345.html

 

[fossyant]

You ideally need another 1x chainset. I have a Deore 2x set of cranks (no chain rings). 1x chainrings will usually be a different BCD (bolt diameter) or direct mount.

 

[Ajax Bay]

I need to replace the cranks on my bike as the left one has stripped the pedal threads

Also try SJS Cycles for just a replacement left crank
https://www.sjscycles.co.uk/cranks-left/

Not clear why the OP needs a new crankset/chainset. As @Sharky suggests, just get a replacement 175mm LH crank. Doesn't have to match; just needs to be (assumed) Hollowtech 2 compatible. Minimal expense; minimal faff.