Emonda 2021

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beamerMW
Posts: 2
Joined: Mon Sep 02, 2013 1:48 pm

by beamerMW on Mon Dec 18, 2023 3:13 pm

I am building up an Emonda SL frame, but I have a question about the length of the 2 bolts for the rear caliper. I am using the new ultegra BR-R8170 calipers, which length of bolts do I need for the C & C2 bolts? I will be running a 140mm disc rotor so I am not using the adapter at the rear.
Hope anyone of you can shed some light :wink:

https://dassets.shimano.com/content/dam ... -4860C.pdf
It is number 21 & 22 on the exploded view on the Shimano manual

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Fisherfreerider
Posts: 269
Joined: Thu Sep 29, 2011 1:19 am

by Fisherfreerider on Mon Dec 18, 2023 11:08 pm

Trek frames are 25mm thick which works with the bolts shimano includes.
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by Weenie on Mon Dec 18, 2023 11:08 pm


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beamerMW
Posts: 2
Joined: Mon Sep 02, 2013 1:48 pm

by beamerMW on Tue Dec 19, 2023 8:33 am

Fisherfreerider wrote: ↑
Mon Dec 18, 2023 11:08 pm
 Trek frames are 25mm thick which works with the bolts shimano includes.
I thought the frame was bigger close to the seatstays. So I thought a needed a bigger C bolt. Thanks for the clarification Fisherfreerider!
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LRB23
Posts: 123
Joined: Sat May 23, 2015 5:02 pm

by LRB23 on Fri Jan 12, 2024 6:33 pm

Can anyone confirm what is the maximum wheel tyre combo they have managed to squeeze on an Emonda? I’ve found options for wheels with a 30mm external. Will this be ok along with a tyre around 30-32mm


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Ytse
Posts: 289
Joined: Thu May 05, 2022 11:53 am

by Ytse on Fri Jan 12, 2024 10:24 pm

LRB23 wrote: ↑
Fri Jan 12, 2024 6:33 pm
 Can anyone confirm what is the maximum wheel tyre combo they have managed to squeeze on an Emonda? I’ve found options for wheels with a 30mm external. Will this be ok along with a tyre around 30-32mm


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What's the internal width of the rim? More important than external. I run my Emonda with a 23mm internal width rim + 28mm Schwalbe Pro One TLE tyres, which are cca. 29.6mm on these rims. Plenty of clearance remaining, 30c tyres would fit easily.
2020 Scott Addict RC / 2021 Trek Emonda SLR / 2023 Specialized Tarmac SL8
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LRB23
Posts: 123
Joined: Sat May 23, 2015 5:02 pm

by LRB23 on Sat Jan 13, 2024 12:51 am

24mm internal, 30 external. I’m not sure what tyre I would hypothetically pair it with but something in the region of 30-32?


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hannawald
Posts: 1710
Joined: Sat Dec 17, 2016 7:28 pm
Location: Czech Republic

by hannawald on Sat Jan 13, 2024 9:43 am

LRB23 wrote: ↑
Sat Jan 13, 2024 12:51 am
 24mm internal, 30 external. I’m not sure what tyre I would hypothetically pair it with but something in the region of 30-32?


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Trek specs 28mm max for Emonda but with 6mm gap on each side. Usually the stated max tire width is quoted with 4mm gap. I would say 32mm real width tire is the reasonable max for you. It depends on the tire but on Conti tires I would expect you can achieve that with 28C tires on such a wide rim. Some other tires it might be with 30C. I wouldn't try 32C on a 24mm internal width rim, it might expand to 34 and more...
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