Touring - custom cassetts?
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Has anyone customized a cassett? Or do you use the stock one?
I recently installed a SRAM 8 spd 11 - 32 and found the jump between the 26 and 32 just to big. I was always to high or spinning like crazy.
I made a 13-15-17-19-21-23-25-28-32 from a combination of an LX and a 105 cassette that I bought on sale at Nashbar.
04-11-06, 02:49 AM
Just buy another SRAM cassette with biggest sprocket a 28 or 30 and make your own. But to remove that jump you might need a bit of a jump elsewhere. The 8 speed cassettes are held together by a single hex bolt.
04-11-06, 04:51 AM
see Marchisio (http://www.spokeandsprocket.com/cartgenie/pg_marchisio.asp)
04-11-06, 08:06 PM
You can buy custom touring cassettes from sheldonbrown.com. He also sells loose sprokets so you can make your own.
04-11-06, 11:02 PM
you can make your own. if you look at a new cassette you will notice the cogs appear to be sychronized. this is done by design to ensure chain always gripping cog and makes smooth transition. the cogs are stamped with the tooth count, ie 12t, 34t etc and a code which indicates how its supposed to be used together with other cogs to form cassette.
i made a 12 13 14 15 16 17 18 19 21 once just for fun. you can too.
notice the large diameter cogs ie 23t+ are usually bolted to a carrier to reduce weight. you can dissassemble cogs from carrier and reassemble some other combination, but you have to work around the carrier. smaller cogs are individually mounted on freewheel.
sheldon brown has a lot to say about this. his gear tables are indispensible for planning the build of your custom cassette:
holy crap. sheldon even has a 10 speed table.
04-12-06, 11:19 PM
Once I had to order stuff from Sheldon, I ordered a couple of missing cogs. But apart from that, I cobble my own cassettes from regular Shimano cassettes. So far, with 6 cassettes, I have been able to equip four bikes. All my cassettes follow the same pattern:
– a couple of large gaps at the bottom, for hill climbing;
– close ratios for the rest, except maybe at the top where I widen the gap if necessary.
So far, I made:
– touring bike : 12-14-15-16-17-19-21-25-34 (used with 44-34-22)
– tandem : 13-15-16-17-18-20-23-26-32 (used with 48-38-28-18)
– trailercycle : 11-13-14-15-17-20-23-26-32 (used with a 46 on 20: wheels, I think)
– commuter : 13-15-17-20-24-28-32 (used with 46-36-24
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