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Should I change my gear ratio?

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Should I change my gear ratio?

Old 02-23-10, 03:10 PM
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wagnern
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Should I change my gear ratio?

Just bought a Masi Speciale fixed, I think its 45/15? I live in a pretty hilly area, and from briefly riding (since the weather sucks in the midwest) it seems pretty hardcore.

Should I maybe change my cog, if so, what size/brand? Also, should I get a new lock ring? Maybe like a 17?

thanks!
-Nick
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Old 02-23-10, 03:40 PM
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45/15 is approximately the same as 48/16 which is tough for regular street riding and especially hills.

My preffered street gear is 48/18. Since you have a 45, I'd suggest a 45/17.

I prefer Dura-Ace cogs, but they only make 13-16t. Euro Asia is my next favorite. I have a 17t that is very well made. A new lockring would be nice. A Dura-Ace is only $10 and you won't have to worry about it stripping.
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Old 02-23-10, 03:52 PM
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Originally Posted by wagnern View Post
Should I maybe change my cog, if so, what size/brand? Also, should I get a new lock ring? Maybe like a 17?
Soma makes excellent cogs in larger sizes https://www.worldclasscycles.com/soma_track_cogs.htm about the same price as Dura Ace.
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Old 02-23-10, 04:15 PM
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i prefer surly cogs over soma.

edit: 46/17 is the best ratio for street and new legs. in your case, 45/17 works too.
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Old 02-23-10, 04:21 PM
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I think ~70 gear inches is a good place to start for general riding. I have 39 x 15 on my fixed gear, though the exact ratio technically varies depending on the tires I have on.
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Old 02-23-10, 07:05 PM
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I can vouch for the Surly cogs. Kind of expensive but worth it. My drivetrain is super quiet. I run 46/17 and I also live in a pretty hilly area. It's still semi-tough to climb certain hills but only the really steep ones.
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Old 02-23-10, 08:20 PM
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45/15 eeek

I did some pretty tough climbing ,even for my road bike, on 48/18, so +1 for 45/17.

Surly makes big cogs too, I'm using their 19 tooth cog right now.
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Old 02-23-10, 08:20 PM
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I would go 45/18 if you have a lot of hills/steep hills.
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Old 02-24-10, 01:40 AM
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Originally Posted by wagnern View Post
Just bought a Masi Speciale fixed, I think its 45/15? I live in a pretty hilly area, and from briefly riding (since the weather sucks in the midwest) it seems pretty hardcore.

Should I maybe change my cog, if so, what size/brand? Also, should I get a new lock ring? Maybe like a 17?

thanks!
-Nick
Without knowing JACK about your physique, your particular muscular setup (fast-twitch vs. slow-twitch muscle ratio), general cardio conditioning, lung volume, height, length of your legs etc. etc. etc. I say yes, you should change your gear ratio to 47/18.

It's just as arbitrary as any other advice you'll get in this thread, so it's just as good!
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Old 02-24-10, 01:42 AM
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Because we are all built exactly the same. Hurray for sameness!
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Old 02-24-10, 01:46 AM
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Hurray of thinking back on personal experience. There's not much else that can be done here
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Old 02-24-10, 02:14 AM
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Do 45/17! I think if you're an ambidextrous skidder you'll have like some 30 skid patches! If you're on a budget you should buy eighth-inch cogs and lockring on ebay. The cogs are about 10 bucks cheaper and won't strip your hubs. From my experience, they're awesome on formula hubs.
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Old 02-24-10, 02:23 AM
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Yeah, I suppose I should have listed more about myself?? I'm 26, 6 feet, 165lbs. I eat pretty well and think I am in pretty decent shape. For what its worth the bike is a 58, my inseam is a 32-33.

The 17 sounds good then, thanks guys!
-Nick
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Old 02-24-10, 02:26 AM
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So, if I got this: https://store.somafab.com/trackkogsblack.html

Which one, 1/8 or 3/32??

Then this lock ring, right? https://store.somafab.com/tracklockring.html
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Old 02-24-10, 02:39 AM
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If you have a 1/8" chain then you can use either cog, 3/32" chain and you can only use 3/32" cog
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Old 02-24-10, 02:39 AM
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If you still have the stock cog, chain, lockring, etc, according to the Masi website you need 3/32". The KMC Z610H is a 3/32" chain.
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Old 02-24-10, 04:36 AM
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OP: There's a reason lots of off-the-shelf bikes come with gearing about 42/16. That's a great set-up for reasonably flat riding in a city.
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Old 02-24-10, 12:22 PM
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Originally Posted by teedoff087 View Post
If you still have the stock cog, chain, lockring, etc, according to the Masi website you need 3/32". The KMC Z610H is a 3/32" chain.
Thanks mate, I do have all the stock hardware.

-nick
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Old 02-24-10, 12:28 PM
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So my friend that has the same bike said its a 48/16, does this make much of a difference??
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Old 02-24-10, 12:35 PM
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Originally Posted by wagnern View Post
So my friend that has the same bike said its a 48/16, does this make much of a difference??
Same 81 GI for 45x15 or 48x16. Either way, it's pretty tall. I run a 42x16, which is 71 GI. GI = (# chainring teeth) x 27 / (# cog teeth).
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Old 02-24-10, 12:46 PM
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So in this case, should I get an 18t? At the same time, I don't want to be peddling like a mad man on hills...?

thanks
-nck
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Old 02-24-10, 01:04 PM
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Originally Posted by wagnern View Post
So in this case, should I get an 18t? At the same time, I don't want to be peddling like a mad man on hills...?
Well, 48x18 gives you 72 GI, so yes, that would be correct. As for spinning madly down hills, you just need to rely on a front brake to control the speed. I can easily maintain 30 mph downhill in that gear without having to ride the brake, and can spin out to about 35 mph at the bottom.
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Old 02-24-10, 03:43 PM
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Also, another question: the lockring on the soma site says this,
With our nice beveled inner edge this lockring will fit our 12t cogs. Does not fit Campy or Phil Wood. Sorry Mr. Wood.

Does this mean it will not fit a 18t?

thanks guys
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Old 02-24-10, 03:48 PM
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It will fit the 18t cog. They're just saying it's compatible down to 12t.
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Old 02-25-10, 09:54 AM
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Originally Posted by wagnern View Post
So in this case, should I get an 18t? At the same time, I don't want to be peddling like a mad man on hills...?

thanks
-nck
After reading your self-description, I think you should be able to pick up the strength necessary for a 45/17 in short time. Then again, we know JACK about the hills you have 'round there. Worst case scenario, you'll dismount and push your bike uphill (actually, that's pretty humiliating, I think).
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