If you read through the equations I wrote out, you'll see that mass cancels out (if you can assume you have enough traction to stoppie). I understand those are probably way over most non-engineers heads, though.
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Wide Tire Kits
- Thread starter VexedNyht
- Start date
Sharky
Well-known member
Ou are assuming a lot of things that probably aren't true though. What about the additional weight transfer? Tht weight transfer and its speed does impact the loading on the front tire and traction. Too much loading too quick equals loss if traction.
I ain't no engineer, but even though my 93' gsxr 750 at 550lbs could do stoppies, no way it slows as quick as my 400 odd poud gsxr1000.
it'll be just as expensive locally, if not more. one must assume that anyone offering an existing kit has fixtures available to minimize setup time, as well as drawings to build off of.
CA labor rates are significantly higher than just about everywhere else in the country.
2k sounds cheap TBH.
Maddevill
KNGKAW
- Joined
- Jun 26, 2005
- Location
- Hayward
- Moto(s)
- ZX14,GS750E, KTM 450/540
- Name
- Steve
- BARF perks
- AMA #: 542337
Fat tire kits put food on my table for years. I worked at a shop that did a bunch of drag race and fat tire stuff, not really my thing but it can look pretty good sometimes. 240's on bigger bikes like the Busa and ZX14 kinda fit the look of those pigs. Much bigger and it starts looking goofy. We did a few 18x14's, an inch wider than a 360. Too much for me but to each their own. Not everyone wants to drag knee
Roaring Toyz are good people, Bob is a great guy. I'm sure he can set you up, but he's in FL.
Hey! Who you calling a "pig"?
I'm assuming all of the weight transfers to the front tire, meaning you're on the verge of lifting the rear.
Cruisers often stop in a shorter distance than sportbikes. I'm serious, tests indicate that.
That's a chart I found on the interwebs. I can't guarantee that it's accurate. It doesn't perfectly follow what I said, but notice the 'busa is one of the fastest stopping bikes. It's likely that the cruisers they tested had either sub-par brakes or tires. If you go too long/low the front tire will lock before the rear tire lifts, so there is a limit to how far you should go.
The brake feel on the heavier bike likely won't be as good as on the lighter bike. Similarly, suspension can make a big difference.
The assumptions that I made to calculate deceleration rate aren't perfect, either - they assume a rigid body, no spinning wheels, etc. Heavier wheels/tires will absolutely increase stopping distance. However, I think my assumptions are fairly reasonable.
gixxerjeff
Optimistic Underdog
Thanks for the overdue Data Dan flashback, Junkie.
ST Guy
Well-known member
This. It's a fashion statement. Exactly the same way cruisers are a fashion statement. Stretch the forks out, lower the seat, put your feet way forward like you're getting a GYN exam, raise your handle bars to shoulder level, etc. 'Does all the things you just mentioned, all to detriment of performance and comfort.
It's mainly a fashion statement, but a moderate stretch and larger tire can help quite a bit for drag racing. Then again, most of the stretched bikes you see aren't drag bikes, and some of the kits probably couldn't hold up to drag racing.