Author Topic: .5 offset triple clamps (Read 13486 times) Tweet

gsxrdan · « **on:** February 22, 2010, 06:41:00 PM »

Just trying to figure out if I have enough room for .5 clamps.I still havethe stock busa frt end and with the ad moved up and back I have about 1.5" clearance with a 120/70/17.Is this enough with a lower tire.This clearance is closest to the turbo not the rad.An help would be great.
Tim any input.?

sportbikeryder · « **Reply #1 on:** February 22, 2010, 06:51:48 PM »

Normally the offset clamps are only used with a 16" front tire, and only in classes that have wheelbase restrictions so that a longer swingarm can be used. No real benefit if you aren;t going to lengthen teh seingarm unless you like the look.

If you have a need for them, be sure to measure with the suspension fully compressed and account for the flex of the forks during hard braking.

gsxrdan · « **Reply #2 on:** February 22, 2010, 07:08:58 PM »

I do race in our prostreet series here in Canada and have lots swingarm to use.We have one bike here that has a stock wheel.Pics are in he turbo section KenFs bike.Purple ultra prostreetbike.
Kens bike.(hope it's ok.)

clearance on my bike.

sportbikeryder · « **Reply #3 on:** February 22, 2010, 07:13:45 PM »

Just wanted to put it out there because many think the offset clamps will help them without lengthening the arm.

That tire looks pretty close to be moving the clamps back an additional .75"

gsxrdan · « **Reply #4 on:** February 22, 2010, 07:20:46 PM »

Thanks for your input.I have 1.5" with that 70 series tire.So I guess another .25 with a 5 series.Is .75 clearance enough?I am thinking of the Hayes triples.

gsxrdan · « **Reply #5 on:** March 14, 2010, 11:27:13 AM »

Would someone with off set frt be willing to check how much clearance they have.
Thanks
Dan

nitrousnick1 · « **Reply #6 on:** March 14, 2010, 03:40:56 PM »

I have .75 inch with stock 17 inch wheel. It is definately tight.

gsxrdan · « **Reply #7 on:** March 14, 2010, 06:02:58 PM »

Thanks Nick,is that with busa forks and .5 offset?

2wicked · « **Reply #8 on:** March 14, 2010, 06:49:54 PM »

Dan keep in mind every turbo system is different. To know for sure you would need to check on a hahn system, spacing and placement vary depending on the turbo and header. Our race kits with the 35R will fit but its tight, as on Kens bike.

Richard

gsxrdan · « **Reply #9 on:** March 14, 2010, 07:57:09 PM »

Thanks Richard.I have about 1.5" now with a 120/70/17 tire.How much do I need.I will lose around .75"??

Nem · « **Reply #10 on:** March 14, 2010, 08:17:24 PM »

Yank that 70 series tire and put a low pro 60

gsxrdan · « **Reply #11 on:** March 14, 2010, 10:38:17 PM »

Sounds like it will be close.What tire pilot race?How much does the .5 triples move the wheel?A full 1"?

Nem · « **Reply #12 on:** March 14, 2010, 11:01:00 PM »

Heard the new michelin pure is shorter

Trees will bring it in 3/4"

Patrick10R · « **Reply #13 on:** March 15, 2010, 03:30:08 AM »

I wish I was fast enough to make a rules interpretation...

Blue Streak · « **Reply #14 on:** March 16, 2010, 01:12:35 PM »

Quote from: sportbikeryder on February 22, 2010, 07:13:45 PM

Just wanted to put it out there because many think the offset clamps will help them without lengthening the arm.

That tire looks pretty close to be moving the clamps back an additional .75"

Believe it or not but they do help even on short bikes, they move the weight more over the front of the bike.

gsxrdan · « **Reply #15 on:** March 16, 2010, 01:49:01 PM »

I hope so,I will only have 400hp and want to run a 7 badly.

sportbikeryder · « **Reply #16 on:** March 16, 2010, 03:46:54 PM »

Quote from: Blue Streak on March 16, 2010, 01:12:35 PM

Quote from: sportbikeryder on February 22, 2010, 07:13:45 PM

Just wanted to put it out there because many think the offset clamps will help them without lengthening the arm.

That tire looks pretty close to be moving the clamps back an additional .75"

Believe it or not but they do help even on short bikes, they move the weight more over the front of the bike.

Maybe I fell asleep in physics class? How does moving the front wheel , tire, brakes, and forks towards the rear of the bike move weight farther away from the pivot point, the rear axle?

If you offset the forks in the opposite direction, moving everything further foreward, maybe, but not when you move it towards the rear.

No need to debate it here on gsxrdan's thread though.

nitrousnick1 · « **Reply #17 on:** March 16, 2010, 06:50:28 PM »

I believe when you put the bike on 2 scales (front and rear wheel) there is a big weight transfer to the front with .5 trees. Heavier the front, harder to lift.

sportbikeryder · « **Reply #18 on:** March 16, 2010, 07:22:57 PM »

Quote from: nitrousnick1 on March 16, 2010, 06:50:28 PM

I believe when you put the bike on 2 scales (front and rear wheel) there is a big weight transfer to the front with .5 trees. Heavier the front, harder to lift.

The scales will show higher numbers for the front once the clamps are swapped. The front will be a little harder to lift by picking up on the front wheel. The front will be easier to lift if you do so by applying torque to the rear axle.

Think of the distance from the front axle to the rear as a cheater bar or other lever. When the bike launches, the torque at the rear wants to lift the front of the bike. Asume the front end assembly weighs 40 lbs. if your goal is to keep the front end down, would you rather push down on the front with the 40 lbs with a realy short lever or would you rather somehow push down with 40 lbs on the front with a 10 ft bar attached to the bike.

It's like a cheater bar on a wrench. The "tightess" of the bolt is similar to the rear wheel torque. Using a short wrench and pushing 40 lbs on it will not budge the tight bolt. Using a 10ft wrench and pushing down with 40 lbs will turn the bolt easier.

Short wrench is moving the front wheel back, Long wrench is leaving it alone.

If you also increase the swingarm length the same amount that you moved the front back, th ebike will be less wheelie prone. That said, it woudl be even better to leave the front wheel alone and make the arm longer.

I am not trying to be bitter guys, I just see alot of people spend money on parts that don't help them just because they see the "pro's" do it. In GSXRDAN's case, the offset should help (since he is moving the wheel back) in others, it is better to spend the money elsewhere.
John

gsxrdan · « **Reply #19 on:** March 16, 2010, 10:06:18 PM »

Man looks like I started a worthwhile thread for once.I just figured that if the weight bias was place more on the front even with the same length swingarm the front would want to stay down.I will greatfully use the extra 3/4" wheelbase.

Blue Streak · « **Reply #20 on:** March 17, 2010, 01:28:25 PM »

Quote from: sportbikeryder on March 16, 2010, 07:22:57 PM

Quote from: nitrousnick1 on March 16, 2010, 06:50:28 PM
I believe when you put the bike on 2 scales (front and rear wheel) there is a big weight transfer to the front with .5 trees. Heavier the front, harder to lift.

The scales will show higher numbers for the front once the clamps are swapped. The front will be a little harder to lift by picking up on the front wheel. The front will be easier to lift if you do so by applying torque to the rear axle.

Think of the distance from the front axle to the rear as a cheater bar or other lever. When the bike launches, the torque at the rear wants to lift the front of the bike. Asume the front end assembly weighs 40 lbs. if your goal is to keep the front end down, would you rather push down on the front with the 40 lbs with a realy short lever or would you rather somehow push down with 40 lbs on the front with a 10 ft bar attached to the bike.

It's like a cheater bar on a wrench. The "tightess" of the bolt is similar to the rear wheel torque. Using a short wrench and pushing 40 lbs on it will not budge the tight bolt. Using a 10ft wrench and pushing down with 40 lbs will turn the bolt easier.

Short wrench is moving the front wheel back, Long wrench is leaving it alone.

If you also increase the swingarm length the same amount that you moved the front back, th ebike will be less wheelie prone. That said, it woudl be even better to leave the front wheel alone and make the arm longer.

I am not trying to be bitter guys, I just see alot of people spend money on parts that don't help them just because they see the "pro's" do it. In GSXRDAN's case, the offset should help (since he is moving the wheel back) in others, it is better to spend the money elsewhere.
John

Not trying to get into a debate either but just as Nitrousnick said on a set of scales the front end is much heavier with offset clamps so it will be harder to lift the front wheel since you have now shifted more weight forward on the chassis. I can kind of see what your saying but your examples are apples to oranges and doesn't really apply on these bikes since we are trying to keep the front end down and shifting the weight ballance towards the front does infact help it stay down.

sportbikeryder · « **Reply #21 on:** March 17, 2010, 04:01:16 PM »

Quote from: Blue Streak on March 17, 2010, 01:28:25 PM

Quote from: sportbikeryder on March 16, 2010, 07:22:57 PM
Quote from: nitrousnick1 on March 16, 2010, 06:50:28 PM
I believe when you put the bike on 2 scales (front and rear wheel) there is a big weight transfer to the front with .5 trees. Heavier the front, harder to lift.

The scales will show higher numbers for the front once the clamps are swapped. The front will be a little harder to lift by picking up on the front wheel. The front will be easier to lift if you do so by applying torque to the rear axle.

Think of the distance from the front axle to the rear as a cheater bar or other lever. When the bike launches, the torque at the rear wants to lift the front of the bike. Asume the front end assembly weighs 40 lbs. if your goal is to keep the front end down, would you rather push down on the front with the 40 lbs with a realy short lever or would you rather somehow push down with 40 lbs on the front with a 10 ft bar attached to the bike.

It's like a cheater bar on a wrench. The "tightess" of the bolt is similar to the rear wheel torque. Using a short wrench and pushing 40 lbs on it will not budge the tight bolt. Using a 10ft wrench and pushing down with 40 lbs will turn the bolt easier.

Short wrench is moving the front wheel back, Long wrench is leaving it alone.

If you also increase the swingarm length the same amount that you moved the front back, th ebike will be less wheelie prone. That said, it woudl be even better to leave the front wheel alone and make the arm longer.

I am not trying to be bitter guys, I just see alot of people spend money on parts that don't help them just because they see the "pro's" do it. In GSXRDAN's case, the offset should help (since he is moving the wheel back) in others, it is better to spend the money elsewhere.
John

Not trying to get into a debate either but just as Nitrousnick said on a set of scales the front end is much heavier with offset clamps so it will be harder to lift the front wheel since you have now shifted more weight forward on the chassis. I can kind of see what your saying but your examples are apples to oranges and doesn't really apply on these bikes since we are trying to keep the front end down and shifting the weight ballance towards the front does infact help it stay down.

Ok, go buy the offset clamps and enjoy them. I'll stay with standard offset ones and eat some apples and oranges

Stocker64 · « **Reply #22 on:** March 17, 2010, 06:05:13 PM »

offsets move the cg forward and also lets a longer swingarm to be used to keep the same wb in class requirements..?

Kiwi · « **Reply #23 on:** March 21, 2010, 06:57:30 PM »

Sportbikeryder is correct on this one. It is basic physics. Although I do think the bikes stability improves when the offset on the trees is reduced. Probably because you are getting a bit more trail.

sportbikeryder · « **Reply #24 on:** March 21, 2010, 07:33:04 PM »

Quote from: Kiwi on March 21, 2010, 06:57:30 PM

Sportbikeryder is correct on this one. It is basic physics. Although I do think the bikes stability improves when the offset on the trees is reduced. Probably because you are getting a bit more trail.

It should add a bit more trail as mentioned.

Stocker, it actually moves the CG backwards (toward the rear axle) if you just offset the clamps. When the arm is then lengthened, it makes the cg end up farther forward from teh rear axle than before.

Woudl be better off just adding the length to the arm as far as the cg distance. The stability Kiwi mentioned may be beneficial, however, it is likely not a requirement in all but th efastest bikes that make the front light at the top end.

Stocker64 · « **Reply #25 on:** March 21, 2010, 09:37:00 PM »

Quote from: sportbikeryder on March 21, 2010, 07:33:04 PM

Quote from: Kiwi on March 21, 2010, 06:57:30 PM
Sportbikeryder is correct on this one. It is basic physics. Although I do think the bikes stability improves when the offset on the trees is reduced. Probably because you are getting a bit more trail.

It should add a bit more trail as mentioned.

Stocker, it actually moves the CG backwards (toward the rear axle) if you just offset the clamps. When the arm is then lengthened, it makes the cg end up farther forward from teh rear axle than before.

Woudl be better off just adding the length to the arm as far as the cg distance. The stability Kiwi mentioned may be beneficial, however, it is likely not a requirement in all but th efastest bikes that make the front light at the top end.

cool,it is over my head...

gsxrdan · « **Reply #26 on:** March 21, 2010, 09:56:19 PM »

OK lets keep this one going,I just talked to a guy a couple nights ago that said his bike has better traction and definitely 60fts better with the offset clamps.

nitrousnick1 · « **Reply #27 on:** March 23, 2010, 04:20:22 PM »

I have to disagree that the .5 inch clamps make the bike more stable. Not trying to stir up an arguement, I am only speaking from personal experience. I noticed a big change in handling.

gsxrdan · « **Reply #28 on:** March 23, 2010, 10:55:30 PM »

I wasn't sure about it either Nick sort of goes against anything I know about rake.Do you think it helped your 60's.What did you notice about the handling?

Kiwi · « **Reply #29 on:** March 24, 2010, 02:55:17 AM »

I haven't ridden a bike with 0.5" trees but I have 0.75" trees on mine and thought stability felt better than the stock offset.

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Author Topic: .5 offset triple clamps (Read 13486 times) Tweet