Can I fit a 12/30 rear cassette with shimano 105 5700?
04-13-19, 12:08 PM
#1
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Can I fit a 12/30 rear cassette with shimano 105 5700?
Hi, I'm running 10 speed Shimano 105 5700. Right now I have an 11/28 and am thinking of ordering a 12/30. Will it fit with my rear derailleur cage? This is for a 2014 Caad10 105. Front Chainrings are 50/34
Would appreciate any advice before I spend some money. Thanks!
Would appreciate any advice before I spend some money. Thanks!
04-13-19, 12:46 PM
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Hi, I'm running 10 speed Shimano 105 5700. Right now I have an 11/28 and am thinking of ordering a 12/30. Will it fit with my rear derailleur cage? This is for a 2014 Caad10 105. Front Chainrings are 50/34
Would appreciate any advice before I spend some money. Thanks!
Would appreciate any advice before I spend some money. Thanks!
If memory serves me correctly (and somebody correct me if I am wrong) the short cage had a max of 28t and long was 32t but I am sure people have made it work with other setups. You could also get a rear hanger extension to get a bigger gear out of short cage.
04-13-19, 01:43 PM
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You need to ID the RD first, what model it is, the model number will be stamped on he underside of the Parallelogram, this will be RD-5700, if this has an A after (i.e. RD-5700A), you have a later model RD, which these are designed for 11-30t cassettes out the box.
If your bike is stock, this will probably be a short cage model.
If you go to a LBS they would be able to ID this for confirmation.
If your bike is stock, this will probably be a short cage model.
If you go to a LBS they would be able to ID this for confirmation.
04-13-19, 02:01 PM
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I didn't know about the 5700-a model....
04-13-19, 02:22 PM
#7
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You're good to go.
Even the short cage will handle a 12-30T and be in "Shimano specs". Barely.
Even the short cage will handle a 12-30T and be in "Shimano specs". Barely.
Last edited by Bill Kapaun; 04-13-19 at 02:30 PM.
04-13-19, 04:02 PM
#9
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with a minimal difference up front (one is quite minimal ) a short cage & the right chain length can work together.. .
04-16-19, 11:49 PM
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I went from a 28 to a 30t on my 2006 Roubaix with a 105 triple. Even though mine is a long cage, it was a little noisy until I put a Wolf Tooth Roadlink derailleur extender on it. All quiet now, took 5 minutes. It gives more clearance and a better chain angle from big gear to jockey wheel. Its partly an individual frame geometry issue, and may not be a problem for you, but it worked for me.
Last edited by Slightspeed; 04-16-19 at 11:57 PM.
04-17-19, 12:49 AM
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The long cage 5600 series rear derailleur will accept up to a 27 tooth rear cassette. I ran a 28t cassette with it for awhile, but it wasn't optimal; it took a lot of work on the B-screw to avoid the jockey wheel rubbing against the largest cog, and shifting wasn't great.
The long cage 5700 series rear derailleur will accept up to a 30 tooth rear cassette. I am currently using the 5700 series rear derailleur with a 12-30 in back, and 30/39/50 in front. It works really well.
The long cage 5700 series rear derailleur will accept up to a 30 tooth rear cassette. I am currently using the 5700 series rear derailleur with a 12-30 in back, and 30/39/50 in front. It works really well.
04-17-19, 04:55 PM
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Wow ! Didn't realise , the RD-5701 can only use up to 30T . I'm using a 11x34T cassette (10 spd) , with my RD-5701. Only needed a slight adjustment to the "B" screw. Crankset is 34/50.KB
04-30-19, 08:46 PM
#13
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Update: I did it and I like it. The 12-30 cassette works perfectly with my RD-5701. I've put about 200 miles on the bike in hilly conditions. On downhills I miss the 11 tooth but I'm finding myself in the 30 tooth on climbs above 10% grade. Thanks for the advice!
