Bicycle Mechanics - 8 speed for 7 speed?

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.
Can I use 8 speed shifters for a 7 speed bike?
Richard D
02-19-02, 06:43 AM
You can with SRAM shifters, I don't know about Shimano stuff, but you're going to be a convert to SRAM anyway aren't you ;)
Richard
Originally posted by Richard D
You can with SRAM shifters, I don't know about Shimano stuff, but you're going to be a convert to SRAM anyway aren't you ;)
Richard
Not really, I'm just trying to get some shifters on my bike.
Richard D
02-19-02, 07:53 AM
Originally posted by fubar5
Not really, I'm just trying to get some shifters on my bike.
Go on be tempted try the dark side of gripshifting :)
IF you want 7sp specific unless you go old stock or very low level you're out of luck, but just think you can put an 8sp shifter on and you'll impress your mates who won't bother counting the actual cogs. Ummm reminds me of an amplifier that went up to 11...
Richard
bikerider
02-19-02, 03:47 PM
Originally posted by fubar5
Can I use 8 speed shifters for a 7 speed bike?
It will work fine since the spacing between sprockets is nearly the same with 8-speed as with 7-speed (4.8mm vs 5.0 mm IIRC). Obviously they will have to be Shimano or compatible. As you know SRAM ESP will not work with your derailleur. You will have to set the high and low stops properly on the rear derailleur of course and you will not be able to shift into either the highest or the lowest gear selector on the shifter (depending on which way you set it) as the 'stop' on the derailleur will be restricting it.
I guess your deal fell through, huh?
Originally posted by bikerider
I guess your deal fell through, huh?
Yeah..midwestmntnbkr was real nice. I called a few bike shops though and one of them has a 7 speed Alivio shifter/brake lever combo set for 40 bucks. I'll be heading over there tomorrow.
bikerider
02-19-02, 08:52 PM
Sorry to hear that. At least you had good luck in getting the road bike. Speaking of which, now that you have 2 bikes it won't be such a big deal when you have a mechanical problem as you have a backup to get to the bike shop on! Also, there will be less wear and tear on each bike so problems will occur less often.
Hope you get your Fisher going again soon.
LittleBigMan
02-19-02, 09:28 PM
Originally posted by fubar5
Can I use 8 speed shifters for a 7 speed bike?
Probably.
I have a Trek 1200 road bike, triple chainring, 8 speed in the rear.
The STI's went bad and I couldn't afford new ones. For a long time, that Trek sported my mountain bike's handlebars and 7 speed(or actually, 21 speed) shifters and brakelevers.
I finally got the old drop bars and brake levers back on her. How?
I transplanted some ancient Schwinn friction shifters onto her, and, voila! Now, she gets all of her 24 gears perfectly, with no noises (if I wiggle it now and then. I also had to file some metal off the shifter housing to allow a little wider range.) My STI's, with their fancy-shmancy gizmos, were always in need of tweaking, and I could never seem to get it "just right." The only thing I miss is their quickness.
Anyway, you'll never know until you try. I think I remember Sheldon Brown saying that you shouldn't always believe Shimano when they say, "YOU CAN'T." But don't quote me.
Geronimo
02-20-02, 12:00 PM
What brakes and rear hub are you using?
Originally posted by Geronimo
What brakes and rear hub are you using?
Me??? I have Deore V brakes(I'm not to impressed with them, wish I had bought Avids) and Deore DX hubs.
Originally posted by fubar5
Me??? I have Deore V brakes(I'm not to impressed with them, wish I had bought Avids) and Deore DX hubs.
Oh yeah, I've got a few bucks, do you still have the BB bearings for my style BB?
stumpjumper
02-27-02, 10:47 AM
I transplanted some ancient Schwinn friction shifters onto her, and, voila! Now, she gets all of her 24 gears perfectly, with no noises (if I wiggle it now and then. I also had to file some metal off the shifter housing to allow a little wider range.) My STI's, with their fancy-shmancy gizmos, were always in need of tweaking, and I could never seem to get it "just right." The only thing I miss is their quickness.
Friction shifters are THE way to go with road bikes! Easy, light, low maintenance. I dont own a single sti setup in my whole garage.
Originally posted by stumpjumper
Friction shifters are THE way to go with road bikes! Easy, light, low maintenance. I dont own a single sti setup in my whole garage.
They are the only way to go on mountain bikes, as well. When I changed the Ross from a 7-speed freewheel to an 8-speed Shimano freehub, I replaced the flimsy, disintegrating SRAM grip shifts with thumb levers in friction mode.
Those who dislike downtube levers because they prefer to keep both hands on their road bars really should try ratchet or friction barcons.
Powered by vBulletin® Version 4.1.12 Copyright © 2012 vBulletin Solutions, Inc. All rights reserved.