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Old 05-15-2014, 11:18 PM   #1
Shaunpe
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stupid question :/

some guys might thinks its silly question.. i was wondering after parking my bike next to a R1.
Why does small engine bikes has small tires?
like 250's... if it is for beginners, isn't wider tires will be better balance & traction for new riders?
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Old 05-15-2014, 11:47 PM   #2
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With less weight/power, you can take advantage of a thiner rim.and tire. An r1 rim/tire would slow you down from.the added weight. Even racing 250s we only run 140.rears and you can hold it wide open while cranked over with no issues more or less. On a 70 hp sv I still only ran a 160 rear.
Tire type and profile will affect balance and traction more than size.
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Old 05-15-2014, 11:52 PM   #3
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1- smaller engine on big tires will require more engine power. So size of the tires is related to size of engine, sprocket, chain, frame, etc.
2 - law of physic of motion on two wheels. Balance is acquired with motion. if you need wider tires for balance, that means you need training wheels.
3 - Beginners are the last to worry about traction. Beginners should ride moderately with less lean angle and earlier braking.
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Old 05-16-2014, 12:20 AM   #4
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Picture a moto tire on a bicycle
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Old 05-16-2014, 01:46 AM   #5
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Thank you for your answers, i hadn't thought about none of these. you guys left me with no more questions.
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Old 05-16-2014, 07:57 AM   #6
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I bet you're one of those guys that looks over at the guy next to him at the urinal huh?? Don't worry about size envy bro jk bud, just busting your . It's not a stupid question if you learned something.

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Old 05-16-2014, 08:23 AM   #7
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I went wider just cause I wanted to ride Dunlop q3's. The smallest they make was 160.
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Old 05-16-2014, 08:30 AM   #8
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I went wider just cause I wanted to ride Dunlop q3's. The smallest they make was 160.
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Old 05-16-2014, 08:58 AM   #9
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One other thing, smaller wheel/tire has less rotational inertia, so they can change direction easier. This is why upscale sportbikes have forged alloy wheel that are lighter and is also why big cruisers need super wide handlebars and steer like a pig.
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Old 05-16-2014, 09:04 AM   #10
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There are no stupid questions...just stupid answers...like:

'A wide tires add at least 5 more horsepower to your motorcycle. The wider the tire the more horsepower gain you realize. If you want a faster bike, just get some cool, wide tires."

This bike runs at least 2000hp:
stupid question :/

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Old 05-16-2014, 10:34 AM   #11
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Quote:
Originally Posted by stache View Post
There are no stupid questions...just stupid answers...like:

'A wide tires add at least 5 more horsepower to your motorcycle. The wider the tire the more horsepower gain you realize. If you want a faster bike, just get some cool, wide tires."

This bike runs at least 2000hp:
stupid question :/

haha, but that bike DOES run a Chevy 350 and a shitload of spray, and I'm sure it is capable of smoking that rear tire in either gear. I bet it corners about as well as an 18-wheeler, too.
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Old 05-16-2014, 01:24 PM   #12
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Quote:
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haha, but that bike DOES run a Chevy 350 and a shitload of spray, and I'm sure it is capable of smoking that rear tire in either gear. I bet it corners about as well as an 18-wheeler, too.
You think it corners that well?
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Old 05-16-2014, 01:58 PM   #13
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With some very slight mods you should be able to run this very easily.

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Old 05-16-2014, 02:18 PM   #14
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Quote:
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With some very slight mods you should be able to run this very easily.

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Ha! I have a picture of that stupid busa on my phone from last years rally in g-town
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Old 05-16-2014, 03:29 PM   #15
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Old 05-16-2014, 03:51 PM   #16
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Wider tires=wider turns. So if you don't need the extra contact patch for more traction (because of a bigger motor), why would you hamper the handling ability of your bike?

Secondly, a wider tire isn't a training wheel. The bikes ability to stay up-right is much more heavily impacted by the inertia of a rotating wheel than it is by a slightly large contact patch on the ground.
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Old 05-16-2014, 03:58 PM   #17
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Quote:
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I bet you're one of those guys that looks over at the guy next to him at the urinal huh??
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Old 05-16-2014, 04:05 PM   #18
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I dyno'd a busa before n after a 300 tire kit. It lost 30 HP with the 300 tire. I have to laugh when I see them. Sad to see a busa get beat by 600
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Old 05-16-2014, 05:14 PM   #19
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............ and this is motohouston.

Lmao
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Old 05-16-2014, 09:14 PM   #20
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Not a stupid question
Granted a larger tire requires more power to turn, however for those of you studying physics or with engineering / technical background maybe you can enlighten further.

1) Do we agree it is friction between the tire and the road that makes it possible to move the bike forward?

2) Check your physics book, or Google it note friction (Dry or Static friction which is what the tire to road interface sees unless skidding) is determined by the coefficient of friction and the (normal force) direct downward weight. Surface area is not on the equation.
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