Cams buggy wheels/tires

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Cams buggy wheels/tires

Postby Abouwer123 » Sun Jul 26, 2015 2:06 pm

Hey guys, for the people who own/ have built cams buggys running 15" rims, what size tires are you guys running ?
I'm finding it hard getting a narrow 4x4 tire for the front,
What I have found is 15x6 zero offset Sunraysia type rim for the front with a 195/80 r15 semi all terrain tyre, which is 27.3" diameter and 7.5" wide.
And a 15x8 with negative offset running a 215/75 r15 kumho kl71 or bfg mud tyre, which is about 27.7" diameter and 8.5" wide. For the rear

Would this combination work or not?

I want to keep the tire/wheel combination as small as possible to keep the strains off my suspension parts, but still need to be 15" rims to clear my brakes,
Cheers Andre
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Re: Cams buggy wheels/tires

Postby Abouwer123 » Sun Jul 26, 2015 2:14 pm

What do you think will happen if I ran 215/75 r15 kumhos on all 4,
But the front with positive or zero offset and the rear with negative offset rims?
Would I still be able to steer? I do have power steering,
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Re: Cams buggy wheels/tires

Postby Simon1 » Tue Jul 28, 2015 9:47 am

I run the same rims as you are thinking. 15 x 6 zero offset front. 15 x 7 neg 13 (hilux rims) rear.

Micky Thompson baja pro 31" on the front.
Any cheap 30-31" aggressive mud or all terrain tyre on the rear. At the moment have Hercules MTs.
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Re: Cams buggy wheels/tires

Postby Abouwer123 » Tue Jul 28, 2015 5:47 pm

Thanks Simon,
What width tire is the front?
And also the rear?

Does it handle good the way you have it atm?

Thanks
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Re: Cams buggy wheels/tires

Postby Simon1 » Tue Jul 28, 2015 10:04 pm

7" and 9.5 I think. Handled ok on my old car, but the were big and sucked the life out of the cbr1100 a bit

Using them again on my new car, but it is zx14 powered.
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Re: Cams buggy wheels/tires

Postby Abouwer123 » Tue Jul 28, 2015 10:21 pm

Yeah ok, that's what I thought, another reason I want to keep it around 28-29"
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Re: Cams buggy wheels/tires

Postby Simon1 » Wed Jul 29, 2015 1:58 pm

that's with 4:1 as well.

Its hard to get any decent travel in the rear with small tyres, especially if you don't want your car to ground out.
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Re: Cams buggy wheels/tires

Postby Abouwer123 » Thu Jul 30, 2015 12:40 am

You mean 4:1 gearing, what size sprocket do you run on the front ,15 tooth?
Yeah and you're not wrong about the travel....
Where do did you get the Baja tyres from, because half the tyre shops in my town have never even heard of them before,
And the one that does; want $400 for one tyre, which seems a bit steep?

What's sort of speed where you getting with the 1100?
Top speed-
0-100?
It would still be plenty of power for a recreational buggy right? I'm not going to be racing it yet,
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Re: Cams buggy wheels/tires

Postby Tony » Thu Jul 30, 2015 1:41 pm

Run the following:

Front rims: 15x5" with 3" inside offset.
Rear rims: 15x7" with 2” inside offset.

Front tyres: 30x7x15 Baja Pro
Rear tyres: 30x9.5x15 4x4 type

Gearing of 4:1 is ideal, (15-60 ratio).

If the front rims are widened outward more it will certainly make the steering heavier.
On the rear the offset is less important.

The Micky Tompson Baja Pro is sold through Micky Tompson dealers, although not many of these dealers keep these tyres in stock & may be special order.
Yes, they will be around $400.00 each.
On the rear any 30x9.5x15 4x4 tyre will do.
I like the Maxxis as they have a softer side wall & not too heavy construction.
On a race buggy beadlock rims are essential.
Especially since a bike powered buggy with good suspension has much higher cornering speed capability & stresses the tyre sidewall a great deal.

Last weekend driving my X2 I noticed the steering was a little on the heavy side, but kept on driving regardless as it was handling fine.
Upon stopping I noticed the front left tyre to be dead flat, (Baja Pro).
The beadlock had kept the tyre in place & prevented the tyre beads pealing away.
The tyre has a reasonable sidewall stiffness & that’s why it was still driveable without doing damage to the tyre or causing bad handling issues.
Not a good practice to drive like that, but if it was a race situation it would certainly get you back to the pits at a reasonable pace.
"There can't be a practical reason for believing in what isn't true" – Sir Bertrand Russell.
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Re: Cams buggy wheels/tires

Postby Simon1 » Thu Jul 30, 2015 3:27 pm

Yea, 4:1 gearing. I found it way too tall. I was running 15/60. The chains would just survive with this ratio. Car would do about 120-130 flat in 4th gear. It didn't have the power to pull 5th or 6th. Hard to get off the mark, would pull to 100 quickly and easily, but wouldn't really get going much after that.

My new car is 4.7:1 running what is essentially a doubly jackshaft arrangement. 17/36 on the primary and 18/40 on the secondary chains. All the chains will be in an oil bath and there is a reverse in there as well. Still untested and not sure if it is going to handle zx14 power. By my calcs I should be doing about 170 in 6th - more that enough for the racing I want to do.

My Baja pros where around the $350 mark, but that was a few years ago now. They wear quite well on the front, so as long as you don't stake them they will last a long time.

I never worried about beadlocks, but I do run tubes. I like the steel sunraysia rims. You pay a bit in weight, but you also don't cry when you put a massive ding in them on rocks either. I made my midboards based on the 6 stud pattern. Just so much easier to get cost effective rims.
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Re: Cams buggy wheels/tires

Postby Abouwer123 » Thu Jul 30, 2015 6:09 pm

Okay, thanks tony?
Are there any other beadlocks 15x5 rims out there?
I can't justify to my parents spending $400 a rim for the edge ones, although unwound love to!
As far as the parents know they reckon the buggy is only costing me like 5 grand hahahah, which it definitely isn't :p
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Re: Cams buggy wheels/tires

Postby Abouwer123 » Thu Jul 30, 2015 6:12 pm

Awesome Simon, sounds like a good set up, let us know how it goes!
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Re: Cams buggy wheels/tires

Postby Tony » Fri Jul 31, 2015 1:00 pm

Not sure on what other brand of Beadlock are on the market that would suit.
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Re: Cams buggy wheels/tires

Postby keepthedirtflying » Fri Jul 31, 2015 10:35 pm

http://www.ebay.com/itm/15-DIY-weld-on- ... 38&vxp=mtr

May be an option?

You can pick up steel sunrasier rims for $50 each and weld this DIY kit on?
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Re: Cams buggy wheels/tires

Postby Oijcu1ariy » Mon Jun 12, 2017 5:49 pm

for one tyre, which seems a bit steep?
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