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Old 10-11-17, 02:27 AM   #1
Big Dave Crowe
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S.O.S! Swap 24 speed or higher into a Trek 7000 Frame

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I want to keep my 2011 trek alpha1 frame because:
A. The geometry is perfect for me.
B. The frame is heavy duty, just how I like em.

Here's The Spec's:
Frameset

Frame
Alpha White Aluminum
Fork
High tensile steel w/curved blades

Wheels
Alloy hubs; Bontrager 550 36-hole alloy rims

Tires
Bontrager H4, 700x35c

Drivetrain

Shifters
SRAM MRX, 7-speed twist

Front derailleur
Shimano M191

Rear derailleur
Shimano TX51

Crank
Shimano M131, 48/38/28 w/chainguard

Cassette
Shimano 14-34, 7 speed

Pedals
Nylon platform

Components

Saddle
Bontrager Boulevard

Seatpost
Alloy, adjustable suspension

Handlebar
Bontrager Approved, steel, 50mm rise

Stem
Alloy, adjustable rise

Headset
Threaded, semi-cartridge bearings, sealed

Brakeset
Tektro V-brakes w/Tektro alloy levers, Kraton inserts

Colors
Platinum/Sparkling Silver

So after years and years of riding, it was time to strip it. Now it's down to the handlebars and frame.

The Project.

Buy a used hybrid from Craigs List with 24 speeds or higher (already have another 21, time for a change) and swap everything over.

The Question

Which bikes/models/years can be the perfect donors.

NOTE:
IF I CAN FIND A MODEL WITH 36 SPOKES WITH DOUBLE WALL RIMS, THAT WOULD BE AWESOME.

I need all the suggestions I can get Hybrid Kings...
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Old 10-11-17, 04:11 PM   #2
hokiefyd
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You're looking for a rear wheel with an 8-speed freehub with 135mm hub spacing. Generally, most 24-speed hybrids will fit this category. It'll be hard to give specific makes and models of bikes because there are a lot of variables, and different trims can come with different equipment. Even "29er" mountain bikes with rim brakes may work, as it's the same size wheel (29" is the same as 700c -- both are 622mm in actual diameter). The wider mountain bike tire might not fit in your frame, but you could mount a narrower tire to the rim and get it to work.

Prices will certainly vary tremendously, depending on your local market and other factors.

You may find that ladies' bikes are less expensive because there is typically less of a market for that type of frame. Because you'll be swapping parts over to your frame, you don't care the condition or configuration of the actual frame, so you may be able to use that to your advantage.
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Old 10-11-17, 04:19 PM   #3
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All you really need is eight speed shifters and cassette, or in your case, a freewheel. The rest can be 7-9 sp mtb or 7-10 sp road. The chain and crankset can be 8-11 sp.

The best 8 speed parts are M900 XTR, which came out in 1993, and M950 XTR. In 1996 8 speed trickled down to XT and LX. In 1998, XTR M952 went 9 speed and 8 speed started its way down the totem pole. Fast forward to today and modern 8 speed parts are low quality yet available.

Your rear hub may be a freewheel, so you may either swap to a freehub or get a new freewheel.

So any old mtb from '90-today can be a parts donor for derailleurs, mid 90's on for 8speed shifters. I wouldn't bother with a used cassette or freewheel. Something like an STX group is super cheap, durable, and plentiful. As for specific models, there are too many to list. If you find a bike with Deore LX or better parts, just ride that bike as its likely nicer than your trek
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Old 10-11-17, 07:38 PM   #4
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If his current bike is set up with a 7 speed freewheel or freehub, it's very likely to need redishing in order to fit an 8 speed freehub or an 8 speed freewheel on it, right? I don't think 7 and 8 speed are compatible. 8/9/10 are, but 7 and 8 use different dishing.
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Old 10-12-17, 01:08 AM   #5
pjthomas
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I just upgraded a 2000 Trek 720 Multitack from 7 to 9 speed. All new drive train. I had to replace the freehub and redish the wheel, not a big deal.

I suspect you have a freewheel, not a cassette, because the smallest cog is 14, not 11. If your derailleurs/crank are still good you could just buy a sunrace 8 speed freewheel and shifter.

But probably not, so finding a donor hybrid bike seems like an option but probably not also for the same reason. Used hybrids will have budget components and probably worn components. For the cost of a decent donor you could just buy new better components.
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Old 10-12-17, 07:52 AM   #6
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My suggestion would be to just buy a another used hybrid that has an 8-speed or higher. If the size is correct you're probably fine with the geometry. It doesn't make sense to buy another bike that's presumable newer and probably better quality just to cannibalize it. Buy the bike and keep the old one. Win win.
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Old 10-12-17, 12:03 PM   #7
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Quote:
Originally Posted by Big Dave Crowe View Post
The Project.

Buy a used hybrid from Craigs List with 24 speeds or higher (already have another 21, time for a change) and swap everything over.

The Question

Which bikes/models/years can be the perfect donors.

NOTE:
IF I CAN FIND A MODEL WITH 36 SPOKES WITH DOUBLE WALL RIMS, THAT WOULD BE AWESOME.

I need all the suggestions I can get Hybrid Kings...
Ok, as mentioned above, you probably have a 7 speed freewheel. They do make 8 speed freewheels for not a lot of money, but you may have to do some truing and dishing. It never hurts to snag new parts for wear items like freewheels, cassettes, and etc. People also say that the longer axles for an 8 speed freewheel can risk getting bent, so a quality cassette hub may be better.

But my question would be what are your goals? Are you wanting to spend $100 to $200 to add a single sprocket onto the rear of your bike? Are you wanting to add an 11T sprocket to the rearend (which is available in freewheels)? Trigger Shifters?

Perhaps mangled a rear wheel, and now it is time to replace?

As far as donor bikes, watch Craigslist for 24 and 27 speed hybrids. However, you'll likely be hunting in a market where you may choose to keep the whole bike rather than stripping it.

Try a Craigslist search, then see what pops up:
(hybrid|700|700c) (24|27)
Some of the bikes will have disc brakes. Some of the early model disc brake wheels will have a rim brake track, but later model wheels often are optimized for disc brakes only, and won't have a nice square brake track.

You'll have to evaluate each bike independently. There are just far too many variables to hunt for specific bikes, including upgrades that a previous owner might have done.

You may be able to see the thickness of the rim or style of the rim in the photo to indicate that it is probably double wall.

An option is to keep an eye out for good used parts at thrift stores or local bike co-op recyclers. Good wheels show up regularly, often for good prices.

Thrift store bikes are often battered, but can also be good parts donors for a reasonable price.
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Old 10-12-17, 12:38 PM   #8
DorkDisk
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If its a 135mm with 7 speed, there is no re-dishing required. 130mm to 135mm will require re-dishing.

Most 7speeds were 135mm spacing so OP should measure the spacing. In the end, redishing is simple and doesn't require new parts.

Quote:
Originally Posted by hokiefyd View Post
If his current bike is set up with a 7 speed freewheel or freehub, it's very likely to need redishing in order to fit an 8 speed freehub or an 8 speed freewheel on it, right? I don't think 7 and 8 speed are compatible. 8/9/10 are, but 7 and 8 use different dishing.
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Old 10-12-17, 06:11 PM   #9
pjthomas
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Quote:
Originally Posted by DorkDisk View Post
If its a 135mm with 7 speed, there is no re-dishing required. 130mm to 135mm will require re-dishing.

Most 7speeds were 135mm spacing so OP should measure the spacing. In the end, redishing is simple and doesn't require new parts.
No dishing is required only if there is room for the extra cog between the existing cogs and the frame. Otherwise the hub must be moved along the axle towards the nondrive side to make room extra cog by juggling the spacers. The rim is then brought back to center by redishing.
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