Chain Length when changing cassette
Moderator: robbosmans
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for chainstay=410,420,430 it's the same recommended chainlength, for chainstay=425 chainstretch=0.14 of link for 30T over 28T - it's ok,
for chainstay=415 chainstretch=0.36 for 30T over 28T chainlength, it will work, but it is better to add extra link (even if you plan to swap 30T/28T)
chainstay length=410mm 52x11-28T chain length unrounded=53.51 recomended=54 links
chainstay length=410mm 52x11-30T chain length unrounded=53.97 recomended=54 links
chainstay length=415mm 52x11-28T chain length unrounded=53.89 recomended=54 links
chainstay length=415mm 52x11-30T chain length unrounded=54.36 recomended=55 links
chainstay length=420mm 52x11-28T chain length unrounded=54.29 recomended=55 links
chainstay length=420mm 52x11-30T chain length unrounded=54.76 recomended=55 links
chainstay length=425mm 52x11-28T chain length unrounded=54.68 recomended=55 links
chainstay length=425mm 52x11-30T chain length unrounded=55.14 recomended=56 links
chainstay length=430mm 52x11-28T chain length unrounded=55.07 recomended=56 links
chainstay length=430mm 52x11-30T chain length unrounded=55.54 recomended=56 links
for chainstay=415 chainstretch=0.36 for 30T over 28T chainlength, it will work, but it is better to add extra link (even if you plan to swap 30T/28T)
chainstay length=410mm 52x11-28T chain length unrounded=53.51 recomended=54 links
chainstay length=410mm 52x11-30T chain length unrounded=53.97 recomended=54 links
chainstay length=415mm 52x11-28T chain length unrounded=53.89 recomended=54 links
chainstay length=415mm 52x11-30T chain length unrounded=54.36 recomended=55 links
chainstay length=420mm 52x11-28T chain length unrounded=54.29 recomended=55 links
chainstay length=420mm 52x11-30T chain length unrounded=54.76 recomended=55 links
chainstay length=425mm 52x11-28T chain length unrounded=54.68 recomended=55 links
chainstay length=425mm 52x11-30T chain length unrounded=55.14 recomended=56 links
chainstay length=430mm 52x11-28T chain length unrounded=55.07 recomended=56 links
chainstay length=430mm 52x11-30T chain length unrounded=55.54 recomended=56 links
'
If the chain is at the limit for 52/28 then shifting 52/30 will rip off your derailleur/hanger/dropout, simple as that.
Unthread the chain from the rear derailleur and put it over the 52 and the 30. If you can do this without tension, you can carefully try it with the derailleur and see how stretched out the arm is.
My bet would be that the chain is long enough, but the price for when it isn't is too high to not check.
Unthread the chain from the rear derailleur and put it over the 52 and the 30. If you can do this without tension, you can carefully try it with the derailleur and see how stretched out the arm is.
My bet would be that the chain is long enough, but the price for when it isn't is too high to not check.
also, seems that 11 spd has tighter tolerances according to Park Tools. they are now making a chain check tool that is .5/.75 instead of .75/1.0.
i run mine at 53 links...with the KMC missing link =54 total. that's for a 52/28.
i read somewhere here that someone put a 30 on the short cage and it works fine...just adjust the B limit screw.
i run mine at 53 links...with the KMC missing link =54 total. that's for a 52/28.
i read somewhere here that someone put a 30 on the short cage and it works fine...just adjust the B limit screw.
- Factor Ostro VAM Disc
- Factor LS Disc
- Specialized Aethos Disc
- Sturdy Ti Allroad Disc
- Guru Praemio R Disc
- Factor LS Disc
- Specialized Aethos Disc
- Sturdy Ti Allroad Disc
- Guru Praemio R Disc
Just letting you know that I purchased and installed the 11-30T Cassette with my 52/36 chainring combo and it fit and works perfectly. As it's Di2, I updated the config in the Shimano e-Tube software and all is fine even with Synchro Shifting. There was no rear derailleur adjustment necessary.
Thanks for the advice and thoughts.
Thanks for the advice and thoughts.
- wheelsONfire
- Posts: 6294
- Joined: Mon Jul 07, 2014 8:15 am
- Location: NorthEU
Haha, well come again when you mounted a 11-36T (Sram 1170)
Bikes:
Ax Lightness Vial EVO Race (2019.01.03)
Open *UP* (2016.04.14)
Paduano Racing Fidia (kind of shelved)
Ex bike; Vial EVO D, Vial EVO Ultra, Scott Foil, Paduano ti bike.
Ax Lightness Vial EVO Race (2019.01.03)
Open *UP* (2016.04.14)
Paduano Racing Fidia (kind of shelved)
Ex bike; Vial EVO D, Vial EVO Ultra, Scott Foil, Paduano ti bike.
Here's my sad tale, when I put on a 32.
DIY Carbon fiber repair - seatstay.
I see you have things sorted... I only put this here as a caution to others.
DIY Carbon fiber repair - seatstay.
I see you have things sorted... I only put this here as a caution to others.
Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓ Broad Selection ✓ Worldwide Delivery ✓
www.starbike.com
ooo wrote:for chainstay=410,420,430 it's the same recommended chainlength, for chainstay=425 chainstretch=0.14 of link for 30T over 28T - it's ok,
for chainstay=415 chainstretch=0.36 for 30T over 28T chainlength, it will work, but it is better to add extra link (even if you plan to swap 30T/28T)
chainstay length=410mm 52x11-28T chain length unrounded=53.51 recomended=54 links
chainstay length=410mm 52x11-30T chain length unrounded=53.97 recomended=54 links
chainstay length=415mm 52x11-28T chain length unrounded=53.89 recomended=54 links
chainstay length=415mm 52x11-30T chain length unrounded=54.36 recomended=55 links
chainstay length=420mm 52x11-28T chain length unrounded=54.29 recomended=55 links
chainstay length=420mm 52x11-30T chain length unrounded=54.76 recomended=55 links
chainstay length=425mm 52x11-28T chain length unrounded=54.68 recomended=55 links
chainstay length=425mm 52x11-30T chain length unrounded=55.14 recomended=56 links
chainstay length=430mm 52x11-28T chain length unrounded=55.07 recomended=56 links
chainstay length=430mm 52x11-30T chain length unrounded=55.54 recomended=56 links
How do you calculate this?
Is there any online tool for this?