Dura ace down tube shifters
Dura ace down tube shifters
I have at the moment 105 7x3 down tube shifters ( sis /friction ) can I put dura ace 3x9 sis/friction) straight on or do I need to change the cassette (1987 Raleigh randonnuer) any advice greatly received) ps if anybody has a set spare or better please pm me Thank you Michael
Re: Dura ace down tube shifters
Why would you want to fit 9 speed shifters unless you also wanted to fit a 9 speed cassette?
If your current hub has a 7 speed freehub, it will not be wide enough to take a 9 speed cassette (unless the latter is modified by removing a sprocket). A full 9 speed cassette will only fit on a 8/9/10 speed freehub. If your wheel has a 8/9/10 speed freehub, you will be able to tell because there will be a 4.5mm spacer behind the 7 speed cassette.
If your current hub has a 7 speed freehub, it will not be wide enough to take a 9 speed cassette (unless the latter is modified by removing a sprocket). A full 9 speed cassette will only fit on a 8/9/10 speed freehub. If your wheel has a 8/9/10 speed freehub, you will be able to tell because there will be a 4.5mm spacer behind the 7 speed cassette.
Re: Dura ace down tube shifters
My problem was I couldn't find 7 speed dura ace shifters only 9 speed only wanted to know if I could just use them in place of my 105 shifters sorry if I misled you .Michael
Last edited by Periday on 14 Oct 2021, 3:39am, edited 1 time in total.
Re: Dura ace down tube shifters
Yes I've just re-read my initial message .it is misleading .stupid boy all I really want is 7 speed Dura ace down tube sis/friction shifters to replace the 105 shifters
Last edited by Periday on 14 Oct 2021, 3:33am, edited 2 times in total.
Re: Dura ace down tube shifters
I've got some DA down-tube shifters. 7-speed, but not sure about the 3*7 bit. Intended for a TT bike. Don't even know whether they made separate 3*7 ones.
Re: Dura ace down tube shifters
I don't think this will work due to the cable pull of the levers. This website http://blog.artscyclery.com/science-beh ... atibility/ states that a 9 speed lever pulls 2.5mm of cable per click, but a 7 speed lever pulls 2.9mm per click.
Unless of course you use the shift levers in friction mode rather than index mode then they should work fine.
Unless of course you use the shift levers in friction mode rather than index mode then they should work fine.
Re: Dura ace down tube shifters
8 speed Tiagra SL-R400 levers are available for £27, and will work with 7 speed*.
* The difference in cable pull between 7 and 8 speed is 0.1mm per click. If the indexing using an 8 speed lever is centred on the middle sprocket of a 7 speed cassette, the 'misalignment' compared with using a 7 speed lever will be 0.3mm for the smallest and largest sprockets. In my experience that amount of misalignment is not noticeable.
* The difference in cable pull between 7 and 8 speed is 0.1mm per click. If the indexing using an 8 speed lever is centred on the middle sprocket of a 7 speed cassette, the 'misalignment' compared with using a 7 speed lever will be 0.3mm for the smallest and largest sprockets. In my experience that amount of misalignment is not noticeable.