What gearing? - London Fixed-gear and Single-speed

thebobbybobbob · 28th August 2008

hello...i'm riding 48-16 and considering 46-16 for my new build to make stoppin and startin easier on my old legs and cos it'll look a bit tighter...do you guys think i'll notice a big drop in top speed etc? thanks

pj (pj) · 28th August 2008

teeth on the back are bigger and cheaper than teeth on the front. so to speak.

i'd be very surprised if a. you noticed it and b. it looked any 'tighter'.

kam · 28th August 2008

48-17 or 48-18. gets spinny after that

Archi Pelago · 29th August 2008

48:16 = 78.9gi
48:17 = 74.3gi
48:18 = 70.1gi

mikec · 29th August 2008

I have gone from 48-16 to 48-17 to 48-18 and now to 48-19. The switch from 48-18 to 19 was not by choice, but due to not having any other sprockets available. I have to say, it is doing absolute wonders for my cardio-vascular fitness, and there are no longer any hills in London that are that challenging. Coming down hills is a little hairy though. Having said that, I would not want to ride more than say 20 miles at a time on such a low gearing. 48-18 is ideal all rounder

bikepimp-rcyb · 29th August 2008

50/14 looks tight

Archi Pelago · 29th August 2008

50:14 = 93.9GI

As OP wanted something to make starts/stops easier, I don't think that'll quite cut it. But you are right, would definitely look tighter than current choice! Great for that Fixedgeargallery picture.

mashton · 29th August 2008

48:19 is a gear of champions - mike I still have your 16t :-(

As for the OP - get off 48:16 if you are skidding; it is one skid spot!

RPM · 29th August 2008

Quote:

Originally Posted by mikec

I have gone from 48-16 to 48-17 to 48-18 and now to 48-19. The switch from 48-18 to 19 was not by choice, but due to not having any other sprockets available. I have to say, it is doing absolute wonders for my cardio-vascular fitness, and there are no longer any hills in London that are that challenging. Coming down hills is a little hairy though. Having said that, I would not want to ride more than say 20 miles at a time on such a low gearing. 48-18 is ideal all rounder

I'm planning on 48/19 (with a 15t for track) as I have 50/19 now and usually swap to 50/20 for long rides.

did both Rye and the dunwich dynamo on 50/20, 67.5GI...

yes, you do have to spin down hills, but it's awesome on the flats and climbs.

the only drawback is sore quads..but that's so much more preferable to fucked knees or calfs..so I often use the brake to give my legs a rest on long descents.

the best thing in the world would be a three speed fixed drivetrain.

deadly fanny pack · 29th August 2008

Quote:

Originally Posted by RPM

the best thing in the world would be a three speed fixed drivetrain.

I take it you do know that is very easily possible?

RPM · 29th August 2008

yes.

not sure I'd want to bother though, at the end of the day.

nimhbus · 29th August 2008

you wouldn't bother with the best thing in the world?

but it's the best thing in the world!

nimhbus · 29th August 2008

oh, and i found 48:19 horrible, personally. neither one thing nor t'tother..at least on the rolling countryside round here, anyway. i guess it's pretty smooth in the city

RPM · 29th August 2008

maybe I was being over-enthusiastic.

on reflection, it would be nice to have a changeable fixed DT, but without adding moving parts and fiddly bits, it's not gonna happen. the answer, as always must be HTFU

28th August 2008	#1
thebobbybobbob	What gearing? hello...i'm riding 48-16 and considering 46-16 for my new build to make stoppin and startin easier on my old legs and cos it'll look a bit tighter...do you guys think i'll notice a big drop in top speed etc? thanks
	quote reply

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28th August 2008	#2
pj (pj)	teeth on the back are bigger and cheaper than teeth on the front. so to speak. i'd be very surprised if a. you noticed it and b. it looked any 'tighter'.
	quote reply

29th August 2008	#4
Archi Pelago	48:16 = 78.9gi 48:17 = 74.3gi 48:18 = 70.1gi
	quote reply

29th August 2008	#5
mikec	I have gone from 48-16 to 48-17 to 48-18 and now to 48-19. The switch from 48-18 to 19 was not by choice, but due to not having any other sprockets available. I have to say, it is doing absolute wonders for my cardio-vascular fitness, and there are no longer any hills in London that are that challenging. Coming down hills is a little hairy though. Having said that, I would not want to ride more than say 20 miles at a time on such a low gearing. 48-18 is ideal all rounder
	quote reply

29th August 2008	#8
mashton	48:19 is a gear of champions - mike I still have your 16t :-( As for the OP - get off 48:16 if you are skidding; it is one skid spot!
	quote reply

29th August 2008	#14
RPM	maybe I was being over-enthusiastic. on reflection, it would be nice to have a changeable fixed DT, but without adding moving parts and fiddly bits, it's not gonna happen. the answer, as always must be HTFU
	quote reply

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