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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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12-23-2016, 03:58 AM | #1 |
Not Yet Wild
Join Date: Nov 2016
Posts: 44
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215/30-12 tires vs 215/50, benefits and dangers?
I have a 2014 TXT, programmed but not lifted.
From all I've read, I can fit a 215/50-2 combo without a lift. But I've also seen warnings of the larger tires being a strain on the motor. Supposedly the wheels I've been looking at are 21" tall. 1. Would the 21" put me at risk of burning up the motor (or something else bad happening)? 2. My cart does 19mph now. It would seem I can expect 22mph with the new tires, or is that too hopeful? 3. I actually like the look of the lower profile "30" tires, but I'd like to get the biggest bump in speed as possible. Would the size difference between the 30 and 50 make a difference? I've also heard the ride isn't as good on the low profile tires, although I'll be strictly driving on sidewalks and streets. I appreciate the help. |
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12-23-2016, 12:45 PM | #2 |
Gone Wild
Join Date: Sep 2010
Location: Erie, Pennsylvania
Posts: 989
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Re: 215/30-12 tires vs 215/50, benefits and dangers?
I know you asked about 215/30 and 215/50 wheel tire combos, but I will give some information on a set of wheels/tires that I used. They are size 205-65-10 with new alloy wheels on my 2007 TXT (without lift). The tires are listed on the sidewall as 20.5 inches dia. and so far I have had no issues with running or rubbing. My operation is mostly on level paved roads. They ride good and are smooth and quiet. I'm very happy with the outcome so far. Torque and speed really not that much noticeably different. So far, the controller doesn't seem to mind, but my usage is pretty light with a lot of short trips. You can see them in my Avatar. Hope this helps. - RAY
PS - I think for 22 mph you might need a brisk tailwind :). Last edited by bigstik40; 12-23-2016 at 12:49 PM.. Reason: add ps. |
12-23-2016, 12:54 PM | #3 |
Getting Wild
Join Date: Sep 2016
Location: Bel Air, MD
Posts: 140
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Re: 215/30-12 tires vs 215/50, benefits and dangers?
21 is about as big as you wanna go. as far as side wall, if your main purpose is trail riding the n go with the 50, if your camp, ground neighbor cruising then 30
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12-23-2016, 01:37 PM | #4 |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: 215/30-12 tires vs 215/50, benefits and dangers?
If you are now getting 19MPH on tires that are truly 18" tall (stock height), you will theoretically get 22.2MPH on tires that are truly 21" tall, however the increased tire height reduces the torque where rubber meets road by 14% throughout the motor's RPM spectrum, so you won't reach the theoretical speed. How much slower depends on the tire's inflation pressure, tread design and other factors.
If there are any significant hills on the sidewalks and streets you drive on, your cart will slow more going up those hills than it does with stock height tires. As for ride: The spring rate for the EZGO suspension is based on a 5" sidewall height, so using a sidewall height less than will most definitely have a rougher ride. The sidewall height of a stock tire (18x8.50-8 ) is 5", the sidewall height of a 215/50-12 is 4.23"" and for a 215/30-12 it is 2.54". Also: the 215/50-12 is 20.46" tall while the 215/30-12 is only 17.08" tall. |
12-23-2016, 03:12 PM | #5 | |
Not Yet Wild
Join Date: Nov 2016
Posts: 44
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Re: 215/30-12 tires vs 215/50, benefits and dangers?
Thanks guys. Your feedback is helpful.
Quote:
I'm far from a math major, but it would seem that if the stock wheels are approx 18" tall, the 50's are 20.5" and the low profiles are 17", then the low profiles would actually run slower than the stock wheels? |
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12-23-2016, 11:12 PM | #6 |
Not Yet Wild
Join Date: Apr 2016
Location: South Florida
Posts: 63
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Re: 215/30-12 tires vs 215/50, benefits and dangers?
Yes. Use this with your stock tire size and speed. Play with the wheel combos you want and see the end speed.
https://tiresize.com/speedometer-calibration/ I went with 215/50/12 faster then stock tires. Think they are 20 inchs tall. No rub good ride. I get 25.8 but have a few other things. |
12-24-2016, 12:27 AM | #7 | |
Not Yet Wild
Join Date: Nov 2016
Posts: 44
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Re: 215/30-12 tires vs 215/50, benefits and dangers?
Quote:
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12-24-2016, 09:55 AM | #8 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: 215/30-12 tires vs 215/50, benefits and dangers?
Quote:
At 4400RPM, the 20.5" tire will yield a cart speed of 21.6MPH, less the speed loses due to increased rolling resistance of the taller tire and the high end torque loss due the the numerically lower final drive ratio. Conversely, at 4400RPM, the 17.0" tire will yield a cart speed of 17.9MPH, PLUS the speed gains due to decreased rolling resistance of the sorter tire and the high end torque gain due the the numerically higher final drive ratio. Check the specs in Section-V of the attached Service Manual. |
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12-24-2016, 07:29 PM | #9 |
Not Yet Wild
Join Date: Apr 2016
Location: South Florida
Posts: 63
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Re: 215/30-12 tires vs 215/50, benefits and dangers?
Just the size-if you are stock then its: 18 in the first box then 8.5 then 8. Then put your stock speed. then the new tire size. For example: 215 first box then 50 second box then 12 last box.
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12-25-2016, 12:00 AM | #10 | |
Not Yet Wild
Join Date: Nov 2016
Posts: 44
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Re: 215/30-12 tires vs 215/50, benefits and dangers?
Quote:
Thank you. Just what I needed. |
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