S-works Crank v R7000 105
12-03-22, 06:32 AM
#1
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Thread Starter
S-works Crank v R7000 105
Hi all,
I'm currently running a S-works Crank on BB30 the problem is the arms are 177 and I suspect I'll get a better fit from 172.5. There are two ways for me to achieve this that I'd appreciate opinions on:
Any opinions on the engineering of #1 vs #2 appreciated ie whether it is a more efficient/advanced system (I see lots of ref to Hallowtech etc)
Ps I run flats with zero climbs so weight is no issue.
I'm currently running a S-works Crank on BB30 the problem is the arms are 177 and I suspect I'll get a better fit from 172.5. There are two ways for me to achieve this that I'd appreciate opinions on:
- Purchase a set of 172.5 S-work crank arms; or
- Purchase a R7000 Shimano 105 Crank w/Wheels Manufacturing BB30 to 24mm adapter (Same cost)
Any opinions on the engineering of #1 vs #2 appreciated ie whether it is a more efficient/advanced system (I see lots of ref to Hallowtech etc)
Ps I run flats with zero climbs so weight is no issue.
Last edited by Miller219; 12-03-22 at 07:11 AM.
12-03-22, 10:57 AM
#2
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It's mainly a matter of whether the spindle diameter is the same. I think a BB that is made to BB30 standards will have a 30mm spindle diameter. A Shimano road crank will have a 24 mm spindle diameter.
So you need to see if the BB the fits in your BB30 shell is one that is made for 24mm crank spindles. Otherwise you'll have to change the BB too.
So you need to see if the BB the fits in your BB30 shell is one that is made for 24mm crank spindles. Otherwise you'll have to change the BB too.
12-03-22, 01:35 PM
#3
Clark W. Griswold
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I really don't think a crank arm length is going to really help your fit much honestly. saddle height and positioning and stem length and other factors. Crank length maybe to a tiny degree but not by enough to warrant a swap. The only time I am swapping arms to go shorter is for strike issues.
I would stick with the S-works arms you have and if you are really desperate go for another set if same same.
I would stick with the S-works arms you have and if you are really desperate go for another set if same same.
12-03-22, 02:58 PM
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+1 IMO, unless you're pretty short and the crank is clearly too long. I can't imagine a benefit in shortening your cranks by 3%. If they are to long, consider going shorter than you propose to make the change worth the cost.
Assuming you decide to change, I advise staying with the same cranks. I'm a big believer that simpler is better, and only use adaptors of all kinds as plan B options.
Assuming you decide to change, I advise staying with the same cranks. I'm a big believer that simpler is better, and only use adaptors of all kinds as plan B options.
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
12-03-22, 05:44 PM
#5
Senior Member
At the shop last year I did a conversion like this using the adapter for Shimano crank. Zero issues, worked out nicely, plus the Shimano crank is a better crank anyway. (I am biased as I have a deep appreciation of the engineering Shimano does compared to Specialized) FWIW I run Campagnolo thus I have no user bias.
