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Old 04-01-2020, 04:15 PM
Cory1971 Cory1971 is offline
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Default Ground clearance tires???

Quick question for everyone. I have looked and searched but keep getting mixed answers. I just bought my kart and I want to add a little ground clearance so we can be on regular streets without bottoming out. I was told you can put bigger tires on and that would help. What sizes are people using. Right now I have Bridgestone 4.5/10.0-5. I would like it to be on and off road if possible. Does anyone have any suggestions.
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Old 04-01-2020, 07:44 PM
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Solomonster212 Solomonster212 is offline
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They need bigger sidewall. And if you also want offroad use then I would not go back to the slicks.
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Old 04-02-2020, 12:48 AM
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Just remember that getting bigger tyres means that you will be affecting your gear ratio. Basically making the gear ratio higher. What is your gearing now? That will determine the size tyres you can safely get before negatively affecting performance
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Old 04-02-2020, 08:48 AM
Cory1971 Cory1971 is offline
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I understand. Right now with the clearance so low we cant even enjoy the kart on our neighborhood streets and they are nice. Im not racing but still do enjoy the speed lol. I will look into the gearing and see if i need to change anything after the wheel and tire swap. I did find a guy running Hi-Run LG Turf Lawn & Garden Tire -15/600-6 and 6 x 6.5 Silver Douglas (DWT) Wheels and it works great. Do you guys know if running the larger tire will require clutch upgrade as well?
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Old 04-02-2020, 09:59 AM
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How many teeth does your clutch and axle sprocket have now?

Yep, you'll need to go with 6" diameter rims for taller tires. The 13 or 15" front tires might end up rubbing on your Bumper & Nerf-bars when making tight turns. Although you could re-position (or possibly add more) wheel-spacers to achieve additional clearance. You could also help this situation by purchasing front rims with the maximum available Offset...

I never tried 15" but my buddy ran 13" tall turf tires on his old racekart, It still turned fairly sharp before rubbing.

You probably have a stack of King Pin spacers in-between the front Spindles and the frames Spindle mounts. You could re-locate all those spacers on top of the spindles for a bit of additional ground clearance.

Your frame probably also has serveral different holes for bolting the rear axle on, that would change the rear ride-height too...



You'll need to double check your Hubs bolt patern and center-hole size to see if you need the Metric or US bolt patern, before buying rims. Here's how to measure:
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Old 04-02-2020, 10:00 AM
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Well first, what is the gear ratio??(tooth count on the rear sprocket and the clutch, need to count each one... )
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Old 04-02-2020, 09:05 PM
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15 front and 35 in rear
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Old 04-03-2020, 01:49 AM
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Quote:
Originally Posted by Cory1971 View Post
15 front and 35 in rear
Well dang!!! You are DEFINITELY going to have to change gearing with the tyre change. You have a gear ratio of just over 2 now. It is surprising that you even get that kart moving!

Your increase in clearance with the larger wheels is probably going to be offset by the larger rear sprocket that you will need.

I would get the tyres and a larger sprocket. You are going to need at least a 6:1 ratio, so that is axle tooth count/clutch tooth count.

I have a feeling that you are going to have to ditch that 15T clutch, as it has just too many teeth. Your rear sprocket is going to have to be huge to compensate.
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Old 04-03-2020, 08:02 AM
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Quote:
Originally Posted by Cory1971 View Post
15 front and 35 in rear
Dang, are you sure you counted right?
The axle sprocket in your pics looks like it would be somewhere around a 60 tooth...

It's easy to mis-count sprocket teeth, I'd suggest you mark one tooth with a scratch mark (or felt pen) so you'll be absolutely sure of where you started, and count them both again
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Old 04-03-2020, 09:22 AM
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My bad...lol it says 35 on the side of the sprocket. its actually a 72 tooth.. Sorry guys. My motorcycle sprockets all say the tooth count on the side.
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Old 04-03-2020, 09:26 AM
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That would be chain size......#35 or 3/8" pitch.
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Old 04-03-2020, 12:31 PM
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That is still quite tall gearing which will get worse with bigger tyres. You might have to go lower if you have issues
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Old 04-04-2020, 08:49 AM
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Old 04-04-2020, 10:39 AM
mckutzy mckutzy is offline
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So what is the rear axle size???
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Old 04-04-2020, 11:40 AM
Cory1971 Cory1971 is offline
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1 1/4 axle
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Old 04-04-2020, 07:41 PM
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definitely re-gear it for taller tires
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Old 04-05-2020, 02:16 PM
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Ordered my wheels and tires. We will see how she does and adjust the gearing from there. Thank you guys for the help. Ill post up some pictures when I get it all done.
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  #18  
Old 04-05-2020, 10:53 PM
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Quote:
Originally Posted by Cory1971 View Post
Ordered my wheels and tires. We will see how she does and adjust the gearing from there. Thank you guys for the help. Ill post up some pictures when I get it all done.
What size tyres did you get again?
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Old 04-06-2020, 11:33 AM
Cory1971 Cory1971 is offline
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Hi-Run LG Turf Tire -15/600-6 and 6 x 6.5 Silver Douglas (DWT) Wheels

---------- Post added at 12:33 PM ---------- Previous post was at 12:22 PM ----------

Where I got the idea....



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Old 04-12-2020, 10:12 PM
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Those look bad a$$ on the cart, they'll probably be smooth and grippy on pavement too
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