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  #1  
Old 10-13-2019, 07:57 AM
JohnnyBoston JohnnyBoston is offline
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172.5 MTB Cranks

Time to buy a new MTB as my old one has well, gotten too old!

I've always run 172.5 cranks on all of my bikes and plan to do the same on the new MTB.

I was shocked to see that Shimano has failed me and no longer offers 172.5 XTR cranks.

I was planning to go 2x in the front as I'm not sold on the monster cassette required for a 1x. Without XTR front shifting is if even worth it to try a 2X?

Any recommendations for 172.5 MTB cranks? 1x or 2x. Thanks!
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  #2  
Old 10-23-2019, 05:50 AM
Octave Octave is offline
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White Industries M30 and G30 come in 172.5. They can be set up 1x or 2x and with their spacer kit you can fit them on pretty much any frame regardless of Q-factor, in my experience. Plus they're pretty.
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  #3  
Old 01-07-2020, 06:43 PM
Old School Old School is offline
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Just do the 1x front, with whatever crank you want. The 2x is almost frozen in time, while the 1x is moving forward at record breaking pace.

Depending on where you live, I can't think of a need for 2x10, or 2x12 (shimanos offerings)
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  #4  
Old 01-16-2020, 06:17 PM
polar8 polar8 is offline
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Just wanted to say take a look at +/- 2.5mm cranks as well. I was just researching crank length for my wife's bike and found a few studies showing that it really doesn't affect power output at all. If it feels fine riding, you can expand your search to a much wider range of listings.
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Old 01-17-2020, 12:20 AM
Old School Old School is offline
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Quote:
Originally Posted by polar8 View Post
Just wanted to say take a look at +/- 2.5mm cranks as well. I was just researching crank length for my wife's bike and found a few studies showing that it really doesn't affect power output at all. If it feels fine riding, you can expand your search to a much wider range of listings.
Yeah but you don't want your wives knees to hurt, by using commonly available "mens 175 cranks" I made that mistake.

My rule of thumb is 5'5-6'0, 175mm, less proportionally 172.5, then 170, then 165 for women 5'2 - 5'4
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  #6  
Old 01-22-2020, 05:17 PM
polar8 polar8 is offline
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^Good info. Knee pain is definitely not worth a $50 savings
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  #7  
Old 01-23-2020, 12:51 PM
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ericspin ericspin is offline
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No input on the cranks. I run 175’s on the MTB. I do the unthinkable on the road and ride 175 on one bike Nd 172.5 on the other. But definitely have an opinion on the 1x vs 2x. No brainer....only 1x. I ride MTB mostly these days. I have the the new XTR 12. Beside being possibly the best shifting gruppo ever....including my road DA....the 1x makes MTBing such a joy compared to the old days of 2x. After you ridden it for a minute you’ll wonder why you even thought about it.
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