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7-speed cassette options for Bridgestone RB-2

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7-speed cassette options for Bridgestone RB-2

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Old 08-11-08, 05:40 PM
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7-speed cassette options for Bridgestone RB-2

Hello,

I'd like to upgrade my 1991 Bridgestone RB-2 to facilitate climbing my local hills. the 40-23 combination is not cutting it for the tough climbs.

I see various options on the Harris Cyclery website and I'm curious if anyone knows what will work with my RB-2. I'd like to go the simplest upgrade route possible, thus my hope that a new cassette will work.

The stock cassette is 13 - 14 -15 -17- 19- 21 - 23t, crank is original 52 x 40t

Bike still has the original exage group. Original detailed specs here, middle column

I would love to go with something that takes me to 28 or bigger in the back. I'm interested in the yellow-highlighted options in the image below:



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Old 08-11-08, 05:54 PM
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Keep the 52-40 up front and go with the 13-30 in back. I really like that range for my old legs on NE hills.
It SHOULD work with a short cage Exage RD (works for me), but you'll need a new longer chain.
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Old 08-11-08, 06:20 PM
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any of those will work, save for the one with the 34t large cog.
you'll definitely need a new chain (your old one is too short, and likely worn so it won't mesh will with the new cassette)
your chainrings are likely fine, unless they are VERY visibly heavily worn. (chainring teeth look like shark fins)


consider the cog sizes in the middle of the cassette, too. a cassette with large and or irregular jumps will be kinda annoyying to ride.
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Old 08-11-08, 06:58 PM
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I wouldn't go any larger than what you absolutely need, to try to keep the spacing as close as possible.
Also, you can mix & match cogs from 2 cassettes. I've done that with the E & H cassettes to make a closer geared set for my flat riding. 13-14-15-16-18-21-24.
Since you have the I cassette, you could get an F and make something like a -
14-15-16-18-21-24-28
Just a thought-
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Old 08-11-08, 09:30 PM
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I personally like the 14-32. The first 5 cogs match my 14-24 speed freewheel but it has the 2 lower gears.
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Old 08-11-08, 09:42 PM
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Originally Posted by top506 View Post
Keep the 52-40 up front and go with the 13-30 in back. I really like that range for my old legs on NE hills.
It SHOULD work with a short cage Exage RD (works for me), but you'll need a new longer chain.
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+1 That would be a nice setup unless you have extreme hills.
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