11-34 on Shimano 105 R7150?
10-26-23, 07:13 PM
#1
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11-34 on Shimano 105 R7150?
Hey all,
Can I put an 11-34 on a shimano 105 R7150? I am learning. I read someone said it'll fit on an ultegra r8150 so does it mean the same thing for the 105 stuff? Do I need to buy anything else or just the cassette?
Can I put an 11-34 on a shimano 105 R7150? I am learning. I read someone said it'll fit on an ultegra r8150 so does it mean the same thing for the 105 stuff? Do I need to buy anything else or just the cassette?
10-26-23, 08:44 PM
#2
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According the the Shimano website, the R7150 Di2 rear derailer will function with 12 spd. 11-34 and 11-36 cassettes. Depending on what you are currently running, you might need a longer chain if moving to a larger cassette.
https://bike.shimano.com/en-US/produ.../RD-R7150.html
https://bike.shimano.com/en-US/produ.../RD-R7150.html
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10-27-23, 05:43 AM
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I do believe you will need to add a spacer to the hub to it as the cassette recesses to fit a 10 speed hub so on a 11 or 12, they are just a tab bit wider. So FYI
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10-27-23, 09:38 AM
#6
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Thanks for the help everyone. I will let the mechanic do it for me. I just wanted to be prepared and buy the part ahead of time if I needed any. Appreciate it!
10-27-23, 10:20 AM
#7
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If you're coming from the 11-30T, just note that you''ll be losing the 16T gear to gain the 34T. I often find myself between 14T and 17T, and appreciate the smaller gaps to keep my cadence consistent. Obviously, you'll gain the lower gear for climbing, but it's not without tradeoffs.
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10-27-23, 10:29 AM
#8
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Yes this is something that I recently learned. I love to climb and incorporate a few good ascends on pretty much 9 out of 10 rides I go on. I should incorporate more flat roads every now and again but I like to climb so I can experience the thrill of a descend on the other side haha. I appreciate your input!
10-27-23, 10:58 AM
#9
Senior Member
On my 11-spd drivetrain, I actually ended up ordering a 12-29 cassette from Miche, as it gives me 12-17 in one tooth increments, an easier granny gear than an 11-28 cassette, and all it trades away is the 11T that I almost never use. Another benefit is that the cogs come individually - ie, not built into a carrier - which will allow me to trade out individual cogs to suit my needs.
For example, I'm currently running 12-13-14-15-16-17-19-21-23-26-29. But I bought this range when I lived on the east coast, and didn't have miles of steep climbing available to me.
Now that I'm on the west coast, I'm considering switching to 12-13-14-15-16-17-19-22-25-28-32 by buying the four individual cogs and doing a swap. It would likely make 3mi of 8% more bearable, and the occasional 17% switchback easier, as well.
For example, I'm currently running 12-13-14-15-16-17-19-21-23-26-29. But I bought this range when I lived on the east coast, and didn't have miles of steep climbing available to me.
Now that I'm on the west coast, I'm considering switching to 12-13-14-15-16-17-19-22-25-28-32 by buying the four individual cogs and doing a swap. It would likely make 3mi of 8% more bearable, and the occasional 17% switchback easier, as well.
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