Can i use shimano 9speed shifters with a 10speed RD?
Yes but preferably with a 10 sp chain.
Yes but preferably with a 10 sp chain.
Is it merely a matter of cable tension?
no - its about cable pull. should work fine as long as its the same brand. i’ve done it many times with shimano.
i have a question to add on to this:
will a 7900 RD work with 7800 bar end TT shifters? (my guess is yes?)
also, i’ve heard that 7900 RDs don’t work with 7800 DA or 6700 ultegra (or any other shimano 10 speed stuff)… but why do some companies spec their ultegra 6700 bikes with a 7900 RD? eg. blue RD1.2
http://www.rideblue.com/rd12.php
Can i use shimano 9speed shifters with a 10speed RD?
Dude it will definitely work. I ran 8 speed friction shifters on 10 speed years ago…obviously your indexing will not give you 10 though. Follow?
Can i use shimano 9speed shifters with a 10speed RD?
Dude it will definitely work. I ran 8 speed friction shifters on 10 speed years ago…obviously your indexing will not give you 10 though. Follow?
I believe so. I can make the RD fit fewer speeds but not more.
Um no not really. You could take a 10 speed shifter and it could work just dandy with a 9 speed r.d. and have done it as well.
What I’m saying is that if you start at the top of your cluster with your shifter set to index and you…click…click…down the cluster to the full range you will come up one short and never get to the 11/12 tooth(if you are using a 9 speed shifter/10 speed derailleur). Therefore run it in friction to get that extra bit of pull. Friction mode always goes ‘past the stops’ of what indexing allows.
So, if i’m running a 9speed tiagra shifter with a 10speed 105 RD, can I only use a 9speed cassette or is a 10 possible?
You’re welcome.
http://www.shimano.com/publish/content/global_cycle/en/us/index/tech_support/tech_tips.download.-Par50lparsys-0025-downloadFile.html/01)%20Drivetrain%20Compatability%20Chart.pdf
To be clear there is a difference between bar end shifters and STIs. STIs are strictly limited to a single set of gears. Ie Either 8 OR 9 OR 10.
Bar end shifters will work in indexed (clicky) mode on the specified rear cassette, or in friction mode on all.
I’m not aware of any tiagra bar end shifters.
So, if i’m running a 9speed tiagra shifter with a 10speed 105 RD, can I only use a 9speed cassette or is a 10 possible?
Ok so you are talking about STI road shifters then. HUGE difference and no you can’t mix 9 and 10 and get use of all the gears.
I was referring to road shifters, I guess I should have specified. However, according to chart, it seems that 9speed road shifters are compatible with 10speed RD and cassettes.
I have one for sale if you need it:
Jamie
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9 speed shifters are only compatible with 9 speed cassette. 9 speed cassettes will fit on almost any 8/9/10 speed hubs that aren’t campy. The only exception is a very few 10 speed hubs that were 10 speed only, but those were only made for a short time.
I have 9spd dura ace shifters dating from 2005 paired with DA 7800 10SPD RD. Cassette is 9spd. Don’t know about a 10spd cassette with 9 spd shifter.
No you’re reading the chart incorrectly. It’s saying that the 10 speed rear derailer is compatible with a 9 speed shifter / cassette.
If you go up the diagonal then you need to come back down again.
The STI shifters use a ratchet to tension the gear cable. Each ratchet actuation (gear shift) takes in a fixed amount of cable. The rear mech has no ‘clicks’, it’s just a lever that swings in an out in proportion to the length of cable pulled back to the shifter. Hence why you can use a mech with most cassettes / mechs. However, the key thing is that you need to get the chain lined up over the specific gears on the mech. An 8 speed divides the end to end ‘swing’ into 8 even gears. The 10 speed, into 10 even gears. So you can see that you can’t get an 8 or 9 speed to work with 10 speed (or vice versa).
The big cost is the shifters, RD are $30-50 for something decent. Shifters are very complex, and so cost a lot more.