RADBMX.CO.UK
Technical & Reference Section => Tech and Restoration => Topic started by: motomagII on January 15, 2006, 02:36 PM
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right got 17t freewheel on me back and want to get good chainring for 3 piece whats the smallest i should go .how does it effect the speed /peddaling etc please cheers
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BACK IN THE DAY MOST PEOPLE SEEMED TO USE 43-16 WHICH WORKS OUT TO 53.7 SO TO GET SAME SORT OF GEARING WITH A 17 YOU WOULD NEED A 45-46 WHICH WORKS OUT 52.9-54.1 WELL THATS WHAT MY BOOK SAYS ANYWAY :daumenhoch:
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you need to reach an average of 2.75.....this is done by dividing the front by the rear.
so working it backwards you need to go 17 x 2.75 = 46.75.
so you need a front sprocket as near to 46.75 as you can get....but gregg.....do yourself a favour....by a 16t freewheel and get a 44 front, its much easier.
lol
Dave
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right guys i was after getting smaller new school style not bigger lol.will have to get new rear wheel first then .back to for sale and wanted again lol