TW200 Forum banner

1 - 10 of 10 Posts

·
Registered
Joined
·
127 Posts
Discussion Starter #1
I hope I'm not kicking a dead horse here but I just wanted to hear from some of you guys running the 15/50 sprockets. I'll be doing mostly gravel road riding and mild trails with some hills (no mountains) but on the pavement I would like to run 100kph (60mph) . Just wanted to know what kinds of gains/losses you experience with this set up? Btw I'm 5'11" 225lbs. So she'll be workin'!
 

·
Registered
Joined
·
127 Posts
Discussion Starter #3
Thanks r80 I searched 15/50 but your thread didn't show up. 15t front on order I'm not going to bother changing the chain, the stockers only got 250 miles on it!



Thanks for the leg work!


Ryan
 

·
Registered
Joined
·
2,089 Posts
Im currently running 15/50. I think its the best all around gear ratio for me. But im 5'6" and 150lbs + plus i live in indiana which has a pretty low elevation. I can still climb anything that the tw will go up with this gearing. If its really slow and technical i like the stock gearing. If your road riding mostly it would probably be ok. But if your doing much singletrack/hill climbing i would stay with the stock gearing. Honestly put in ear plugs and the bike sounds so smooth at 60mph. You wont hurt it. I ran mine with 15/47 gears on the interstate from knoxville TN to almost Indianapolis IN, 400+miles at 64-70mph.
 

·
Registered
Joined
·
7,369 Posts
Yer thinking a bit backwards. 15/50=65 teeth.



15/52=67 teeth. More teeth, more chain.



The limiting factor on whether or not you can squeak by with a stock length chain when you have more sprocket teeth is how far forward you can shove the axle. If a stock chain is too long for your chosen combo it becomes how far you can set the axle BACK before you run out of adjustment. As long as it's only a couple tooth difference you usually won't have to sweat it. When you get to a 2-4 tooth difference it can sometimes be a game changer depending on how you arrive at your chosen ratios. Front sprockets are cheap, rear sprockets are not, and chains cost much more.



Theoretically you'd want a 124 for that combo, but in reality you may get by with a stock length chain if there is room on the adjusters.



15/50=3.33:1 final drive ratio. 65 teeth

14/47=3.35:1 ' ' ' 61 teeth



Nearly identical ratios, but the 14/47 MAY require a shorter chain.



15/52=3.46:1 ' ' ' 67 teeth

14/50=3.57:1 ' ' ' 64 teeth



Close enough to the same ratios, but your 15/52 MAY require a longer chain.





So you see you're only slightly higher (lower numerically) than the stock setup. Slightly better for chain wear but not much change in rpm, if that's what you're after. But you'd most likely need a new chain for your combo and it nearly duplicates stock, whereas changing only the front sprocket (cheap) to a 15 results in a significant drop with only a one link difference in the chain.
 

·
Registered
Joined
·
1,393 Posts
I put a 15/49 combo on my '95 last week and 122 link chain is perfect. I haven't rode it yet...lots of stuff still torn apart. I got a 15T for the '08 also and will see if the 122 link chain fits with the stock 50T rear. Probably do that Saturday.



We don't do a lot of hard dirt riding or hill climbing. Deep sand is the worst we have to deal with.
 

·
Registered
Joined
·
7,369 Posts
Not saying any of these combos will neccesarily require a new chain in the real world. Just showing Niqhowie that there's more than one way to skin a cat, and some cats may not even be worth skinning, dollar for dollar.



Depends on what you're trying to accomplish. Personally I draw the line at 13 tooth sprockets, so I never get off cheap on my lowered gearing. It's longer chain and a rear sprocket every time.
 

·
Registered
Joined
·
127 Posts
Discussion Starter #10
Can't wait to try the 15T, sounds like what I'm looking for. I'd like to make it through the intersection / turn before grabbing 2nd gear on the road!
 
1 - 10 of 10 Posts
Top