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recumbent tricycle grearing

Old 09-27-10, 01:20 PM
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Location: hyde park,ma
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Bikes: i still have 5 road bikes that i can't get my leg over the top tube, so in 1999 i bought a greenspeed gto trike

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recumbent tricycle grearing

it seems some cyclists are reading things i post, so i hope some one can use this. i can' t ride a diamond frame anymore so in 2009 i bought a greenspeed gto recumbent tadpole tricycle. since sheldon left before i had time to ask him about appropriate gearing so i turned to john allen. he recomended a 10" low gear which surprised me. anyway, i took his advice. a haif step will not work with 20" dia. wheels. i bought a 11-12-13-14-16-18-21-26-34 custom cassette from harris cyclery. i equipped it with 44-57-67 chainrings & a schlumph md. i bought the 67 from high path engineering in wales. if you are buying a recumbent i feel you should have the bottom bracket chamfered to accomodate a schlumph, you may not need it now but when you get older? a chamfered bottom bracket will accept standard cups. i use 11-14 cluster cogs with the 57 & 67 chainrings. 12-34 cogs with the 44 chainring. the low gear of the schlumph with 14-34 cogs. if you calculate the gears you will find you get 22 usable gears with only 3 duplications. some years ago i read an article written by i think it was dan henry, he stated because of the reduced frontal area of his recumbent bike he had several gears over 100", that allowed me to select a 121.8" top gear. i am still deciding if i will use the microshift or old obsolete stock (only one owner, me, & i have 3, it is a nice all metal) front simplex slj 523 front derailleurs. the simplex 523 are worth the $20 odd they cost new, they are not worth $115.
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