I want to go faster.

OP
dhd.evans

dhd.evans

Veteran
Location
Dundee
This is bang on the money. To up your average speed you dont need to worry about your top speed. Concentrate on the sections where you just plod along.
You spend much more time at middling speeds. Very little at what would be your maximum.
True, but i am definitely hitting above middling on the flats - i get that 'bobbing' rhythm as i start to try to accelerate without enough cog to turn! The 16t will be going on this weekend :biggrin:
 

Sharky

Veteran
Location
Kent
True, but i am definitely hitting above middling on the flats - i get that 'bobbing' rhythm as i start to try to accelerate without enough cog to turn! The 16t will be going on this weekend :biggrin:
Sprockets are cheap enough to try all combinations. Just a one tooth decrease (to 17t) may be enough.
Might be a good idea to find the steepest hill in your area and work out the biggest gear you can manage. A fixed is always going to be a compromise between heaving and twiddling, but the up hills always take longer than the descents, so bias to the upwards gradients might be prudent.
Good luck
 

12boy

Über Member
Location
Casper WY USA
I used to ride 48/16 but headwinds and hills make 48/18 a better choice now. Throw in the extra drag from 35 mm studded tires and 48/18 is starchy enough for me. 46/16 is very close to 48/18 in terms of gear inches. I, however, am not a spinner and like to pedal slowly, grinding along. If I could maintain 100+ rpm comfortably, 48/18 might be a little high.
 

CXRAndy

Guru
Location
Lincs
Some speeds with 25mm tyres various gear combinations

100 rpm.... 48*16 23.61 mph, 48*18 21.02 mph

90 rpm..... 48*16 21.25 mph, 48*18 18.91 mph


I use 42*16 with 35 mm tyres

90 rpm 19.18mph

Old money 71.65 gear inches^_^

Plenty quick enough for a shopper
 
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