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| Q&A: McKendry on Speed (1810 Posts)
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Happy B-Day!
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On 4/11/2006
Mike Moore
wrote in from
United States
(70.249.nnn.nnn)
Happy Birthday Chris!
Have a tortilla on me!
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Tell Mom Good Luck! Hope the Baby is Great!
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On 4/11/2006
North Carolina Longboarder-Downhillbillies.org
wrote in from
United States
(166.82.nnn.nnn)
Pierre, Good luck with the baby! Hope to see you and the Big Mig and the rest of your crew here in the Fall...if not at the FARM!
Marion Karr
MC Hammer Head
Skatesville, North Carolina
DHB WORLD HEADQUARTERS
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Happy Birthday
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On 4/11/2006
Pierre
wrote in from
Canada
(24.203.nnn.nnn)
Happy 45th Chris!
My son may have the same birthday, he is due today!
Take care,
Pierre and family
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re:
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On 4/10/2006 dan@csu
wrote in from
United States
(129.82.nnn.nnn)
thanks chris, that makes perfect sense. as for the fu man chus, my buddy has some and they seem to 'dry up' for whatever reason. they get a yellowish tint, get hard (lose traction) and just look frail; this is from regular riding conditions.
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Camparison of Trucks
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On 4/9/2006
Chris Chaput
wrote in from
United States
(72.67.nnn.nnn)
The diagram was to show that the geometry alone does not dictate how a truck will steer and handle. Putting your axles almost directly on top of the pivot cup will make an inherently unstable truck. Moving the axle away from the pivot cup will force the bushing seats to load the bushings more, which results in more stability. The "unstable" truck can work well as a front truck because it can steer so quickly, but it's not a particularly effective back truck. It lacks traction and control unless and until you offset the axle, moving it away from the pivot cup.
It's hard for me to comment on the Fu Man Chu's. Since their wheel production moved overseas, I haven't seen, raced against, ridden, or heard anything about them. It would be interesting to see what a Biltin Bearing could do for them if I made them with a .300" spacing.
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theory
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On 4/9/2006
martin siegrist
wrote in from
Switzerland
(85.1.nnn.nnn)
the one on the left is stable
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crazyness
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On 4/9/2006 dan@csu
wrote in from
United States
(216.17.nnn.nnn)
chris whats the theory with this?
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wobbly wheel
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On 4/8/2006 Sean
wrote in from
United States
(24.49.nnn.nnn)
Alright guys lets not carried away here. I was simply inquiring to see if I could fix the problem with the wheel. Being that Chris Chaput is very knowlegeable on the topic of skateboard wheels, I was hoping he might give some advice. Maybe his suggestion would be informative to others. I thought this was a friendly Q&A forum. Who are you guys to act like your Chris' forum henchmen?
My intent was not to bash the Gravity Boarding Company. I apologize for offending patrons. In fact, I own the gravity team board and I really like it for sliding. I also own other gravity wheels that work well. However, wouldn't you be a little disappointed if your new wheel spun a little wobbly.
After all, we are talking about $8 mass produced skateboard wheels. They probably aren't subjected to rigorous testing by NASA engineers. Im sure that all skateboarding companies have mishaps from time to time. Its mostly just the one wheel that wobbles. Im not going to crap a brick because I got an unlucky wheel, nor do I think its worth badgering Gravity about it. I just thought I might be able to find a quick fix for the wheel.
Im not going to lie. I don't know everything about skateboard wheels. Maybe its something I did or didn't do that is making it wobble. The bearings aren't broken in yet, but the spacers are right (8 mm). Sorry about this becoming a big ordeal. I still like the Gravity Boarding Company as a whole and would like to pick up the 39" carve someday for its versatility, but I will think twice about their wheels.
Regards,
Sean
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:)
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On 4/8/2006 dan@csu
wrote in from
United States
(216.17.nnn.nnn)
the question is, whats not wrong with gravity wheels?
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oh da nerve
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On 4/8/2006 herbn
wrote in from
United States
(152.163.nnn.nnn)
asking chaput ,"what's wrong with my gravity wheels" what do you think?
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re: wheel balancing
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On 4/8/2006
msk
wrote in from
United States
(68.190.nnn.nnn)
"they rattle back and forth. Im using bearing spacers, speed washers, and Ive tightened them up real good, all to no avail."
Are you using the correct size spacers (.300"/8mm)? From what you described, it sounds like you might be using standard .400" or 10mm spacers, which would allow the wheel the move back and forth about 2mm, even with the axle nuts cranked down tight...
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Gravity wheels
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On 4/8/2006 TJ
wrote in from
United States
(66.75.nnn.nnn)
Sean, how about you take up your concerns with GRAVITY about missbalanced wheels. I'm sure they will get you sorted if need be. I've ridden and seen many sets of the new Fu's ridden and all are fine GREAT wheels that are balanced.
although i do feel bad for giving someone with your POS attitude any decent advise.
take up your complaints with the manufacturer first before you go mindlessly bashing great wheels on a forum, making yourself look like a KOOK ;)
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wheel balancing
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On 4/8/2006 Sean
wrote in from
United States
(24.49.nnn.nnn)
Hey Chris,
I recently purchased the new gravity fu-manchu 74a offset wheels, mounted them up, and noticed they werent balanced when you spin spin them with your hand. they rattle back and forth. Im using bearing spacers, speed washers, and Ive tightened them up real good, all to no avail. I was wondering if you knew whether this is can be fixed somehow? Does this happen to worn out wheels once they cone? My Strikers and my krypto classics roll straight as an arrow ----> Well, now I know not to buy those POS gravity wheels again. I suppose I might replace them with some Gumballs if they dont balance out once they are broken in. Any help would be appreciated.
THanks,
Sean
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Lid
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On 4/5/2006
Steven King
wrote in from
United States
(71.134.nnn.nnn)
Dan,
Check out the Fly helmets on Ebay.
I scored a Fly moto-X helmet, the same model as Timeship sells, DOT approved, for $40. Purchased the shield kit from Timeship for $10. Sold my old helmet ($250 motorcycle helmet, heavy, poor visibility when tucked) on Ebay for $90. That's a square deal.
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luge
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On 4/5/2006 hc
wrote in from
United States
(168.149.nnn.nnn)
thx chris
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Motorized Streetluge
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On 4/5/2006
Chris Chaput
wrote in from
United States
(66.116.nnn.nnn)
There's a whole write up on Roland Morrison's motorized streetluge at http://www.gravitydb.com/speed/, which includes a video clip of him doing over 100mph on it.
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motoluge
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On 4/5/2006 hc
wrote in from
United States
(71.139.nnn.nnn)
just curious, who made that three wheel moto luge?
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Wheels for chairs
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On 4/4/2006
Chris Chaput
wrote in from
United States
(66.116.nnn.nnn)
Inspired in part by the documentary film Murderball, I approached some people at Quad Rugby http://www.quadrugby.com/rules.htm#Art.%2013 about possibly helping to develop a better wheel. I haven't heard back from them yet. Maybe it's time to try again.
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chris' brain bucket
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On 4/4/2006 dan@csu
wrote in from
United States
(12.134.nnn.nnn)
man could you PLEASE reccomend a lid for around $100 for speedboarding? it is a battle finding one thats semi light and has good visibility... i'm sick of hearing "ideas" from random people- i'd rather just have some one like you (experienced) reccomend one so i can just buy it and be done with it! THANK YOU!
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'special' wheels
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On 4/4/2006
dave
wrote in from
United Kingdom
(80.3.nnn.nnn)
Hey chris, you seem to know alot about skateboards and especially their wheels, you like your wheels, i like your wheels, But i think you should also divert your wheel designing talents to the people who need it the most. my friend is in a wheelchair and his wheels are horrible, they are hard and slow, made of poor quality rubber and basically he deserves better. we are lucky enough to know how it feels to glide over rough pavements in silence. My friend as always been intrested in my longboards and imparticular the wheels on my DH board- Abec11 Gumballs. people in wheelchairs dont know about the advancements being made in urethane wheels. i think there are thousands of people who could benefit from your wheels being used for alternative applications. even if your not bothered atall about product diversification, which is fair enough seen as your brand is benchmark in the performance skateboard market, just think about it, we would all want fast wheelchairs if god-forbid anything ever happend to us, right?
anyway im not trying to put a downer on you, its just somthing that i think about and you know your wheels so i thought i would share that with you.
Regards, Dave
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Snell
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On 4/4/2006
Chris Chaput
wrote in from
United States
(66.116.nnn.nnn)
SNELL might be okay if we were sitting upright on a seat and only had to look at what was in front and below us. But that's NOT what we do. As a result, guys are loosening the chin straps, wearing the helmets out of position, removing the protective padding inside, drilling holes in the shell and fabricating shields, etc. If an organizer tells riders what helmet they have to wear, regardless of how safe that he thinks they may be, he is are setting himself up for a nasty lawsuit in which he will be held liable for any and all head injuries should they occur. It seems like he's being a good guy, but he's putting himself (and organized skateboard racing) at risk unnecessarily. If he were to simply demand that a suitable helmet be worn properly, each rider then assumes responsibility (and liability) for protecting himself and the organizer is off the hook.
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bigger
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On 4/4/2006
Pierre Gravel
wrote in from
Canada
(24.203.nnn.nnn)
Sure he could use a bigger helmet, but when i designed that neck, it was to make a SNELL rated helmet more aero.
I also think that forcing racers to use SNELLl is wrong, they are too heavy, offer poor visibility and look bad.
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Boogie
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On 4/4/2006
Chris Chaput
wrote in from
United States
(72.67.nnn.nnn)
That guy could use a bigger helmet.
Boogie boarding or body boarding is a board that you lay down on. No, it isn't surfing, and no, it isn't a surf board. Can you kneel or stand on a body board? Sure, but that doesn't make it a surfboard. Can you add a fin (or fins) to it, or make it longer and stand on it? Yes. Then it's a surfboard. A soft, surfboard. Can you lay down on a surfboard? Of course, but it's not surfing until you stand on it. Can you ride a boogie board in gnarly waves? Yes, but it's still not surfing.
No, I didn't make the motorized luge, or the rocket luge, or the jet luge.
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aero
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On 4/3/2006 dan@csu
wrote in from
United States
(216.17.nnn.nnn)
if the new aero suit is going the direction i think it is, i'm going to try to get trojan or lifestyles as a sponsor.
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