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7-SPEED(16 posts)

7-SPEEDHENRY K
Dec 16, 2003 3:53 PM
This older Trek that I picked up is a 7-speed with downtube shifters. Any opinions on the best way to convert to STI? Keep it 7-speed?
re: 7-SPEEDrussw19
Dec 16, 2003 4:05 PM
YOu can get 7 speed STI shifters but they are very low end. If you are going to use this as a commuter or beater type bike, I would leave it as is. Or maybe go the cheap route and put bar end shifters on it. But if you really want to spend to make it a really nice bike, you should search some places like ebay or the classifieds here and look for an 8 or 9 speed groupo. Maybe someone is upgrading their stuff and you can get a deal on the old stuff? Otherwise you will spend a lot to convert it to STI even if you use the low end shifters. Barcons may be the better option.

Russ
Yes and...SenorPedro
Dec 16, 2003 4:36 PM
IMO Barcons are a very nice way to upgrade an older bike. They aren't as flashy as STI's, yet can give you 8 or 9 speed capability in a light, sturdy, and retro appearing package. They are cheap enough that you won't break the bank and you can use them as friction with your 7 speed cluster until you upgrade at a later time.

For curiousity sake, what model/year is your Trek? I have several and love them all dearly, one went through a transformation similar to what you are describing - its wearing an 8 speed group with barcons.
TrekHENRY K
Dec 17, 2003 4:39 AM
I don't know what year. I am guessing 89-90. It is white w/red lettering, says 1400 on the seat tube and aluminum on the top tube.
Looks kinda like this?...SenorPedro
Dec 17, 2003 7:48 AM
If it is the same graphics then it is probably an '89 like mine. Gotta love the older Treks, plus this might give you an idea of what it would look like when done w/ barcons.

I would check out the rear spacing with a caliper, you might be in the middle somewhere, and despite what some say, the thin aluminum stays will flex enough to put a 130mm wheel in the back, they just won't cold set, so it will take a little effort to put the wheel in each time.
YesHENRY K
Dec 17, 2003 5:54 PM
It looks very much like that only it says 1400 and it has the word aluminum on the tt (so obviously there are no lugs. I tried a 9 speed wheel that I had laying around. It was a little snug but I sanded down the paint on the lugs and it fit pretty good. That changes my whole plan on what to do. I'll just keep watching classified for a used 9-speed group? Thanks!
re: 7-SPEEDjordan
Dec 19, 2003 11:11 AM
7 speed shimano sora shifters are available and although they are considered "low end" they work very well.the biggest drawback is that they are relatively expensive,about $120/set.you may be better off shopping for a new 8 or 9 speed bike with STI than spending so much on a 11 or 12 year old Trek 1400.
126 mm dropout spacing, and you need 130 mmKerry Irons
Dec 16, 2003 5:45 PM
You'll have to spread the rear end, so I hope this bike is steel. Otherwise you're stuck with the narrower spacing and the 7 speed. Converting this bike to STI would involve a new rear wheel, cassette, rear derailleur, and shifters at a miminum if you want 9 speed. That's pushing $400. Is it worth it? If you get some cheap 7 speed STI shifters, what exactly have you accomplished? This last item might be the only thing I would consider, but the advantage is not huge and you're pouring good money into an old bike.
126 mm dropout spacing, and you need 130 mmRusty Coggs
Dec 16, 2003 5:54 PM
Many late 7 speeds were built with a 128 comprimise spacing and even if aluminum they can take 130 hubs.
rear derailleur might be useable.rufus
Dec 16, 2003 8:48 PM
as long as it's not too worn and sloppy, and can cover the range of gears. just adjust limit screws.
re: 7-SPEEDedmundtan
Dec 16, 2003 6:08 PM
I read somewhere (Sheldon Brown?) that if you have a freehub meant for 7-speed, you can upgrade to 8-speed with 9-speed STI levers and drivetrain components. Just remove one cog and spacer, and adjust the limit screws on the rear derailleur.
8 speed using 9 speed parts would be smartestLC
Dec 17, 2003 12:52 AM
When you finally get a 130mm frame you will be happy you went with 9 speed parts so you can still use them. 8 cogs out of 9 speed does fit nicely on a 7 speed hub, that is if it is a casette freehub and not a thread on freewheel.

If the frame is steel you can also get a new rear wheel and spread the frame enough to get a 9 speed hub in there and make it a 130mmm frame.
8 speed using 9 speed parts would be smartestHENRY K
Dec 17, 2003 4:45 AM
Thanks for all of the suggestions. The bike is aluminum so spreading it is out of the question. I was thinking that perhaps I could pick up some older RSX STIs and keep the 7-speed. The rear derailer looks OK. I think that the Bar End shifter idea might be the best. Do the newer Dura Ace Barends for 8-9 speed work with a 7-speed?
Not reallyLC
Dec 17, 2003 10:24 AM
Unless you put them in friction mode, but then your no better off than you are now.
8 speed Ultegra barcons will work with 7 speed...satanas
Dec 21, 2003 5:57 AM
...while 8 speed Dura-Ace barcons (only NOS or used these days) will work with 7 speed with a pre-97 DA rear derailleur *ONLY*, or with 8/9 using any current (or 97 onwards DA) derailleur. 9 speed barcons will work with 8/9 with anything except pre-97 DA.

Also, it seems likely that 10 speed barcons (they're in the catalog) might work with a pre-97 DA rear derailleur in 9 speed mode, but I can't vouch for this! Sadly 9/10 isn't likely to fit on a 7 speed hub.
re: 7-SPEEDdavidcuttler
Dec 19, 2003 9:40 PM
I reacently purchased a used Novara Strada with a 7-speed rear, and a triple up front. It came with a combination of RSX & 105 components. I was never really happy with the way the RSX STI shifted the front chain rings. It would never shift well over all three gears up front. Anyway I changed the shimano triple to a sugino triple with a 48-36-26, which is far better for the hills in the San Fransisco Bay Area. I also scrapped the shifters and installed a set of Ultagra 8-speed indexed Bar-end shifters which worked perfect on the 7-speed rear. The front triple which is friction only, can be shifted without a miss, and no rubbing or noise no matter what the rear gear is. I ride this bike every day during my lunch hour and have come to love it!

The cost was as follows" All parts were NOS (new old stock)and purchased localy, or off ebay.

Sugino triple $30.00
Ultgra indexed bar end shifters - $30.00
Shimano aero brake levers $20.00
111mm sealed bottom bracket $3.50
Bar tape $9.00
New chain $10.00

The chain was "just in case"

If I ever damage the Ultgra STI shifters on my Fuji team, I will go to bar end shifters on it too. I have already aquired a set of 9-speed Dura Ace shifters for it.

David C.