lifted club cars - lifted ezgo
Home FAQDonate Who's Online
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Electric EZGO
Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV.



Post New Thread  Reply
 
Thread Tools Display Modes
Old 12-23-2016, 03:58 AM   #1
LBB
Not Yet Wild
 
LBB's Avatar
 
Join Date: Nov 2016
Posts: 44
Default 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.
LBB is offline   Reply With Quote
Alt Today
BGW

Golf car forum Sponsored Links

__________________
This advertising will not be shown in this way to registered members.
Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum
   
Old 12-23-2016, 12:45 PM   #2
bigstik40
Gone Wild
 
bigstik40's Avatar
Yamaha
 
Join Date: Sep 2010
Location: Erie, Pennsylvania
Posts: 989
Default 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.
bigstik40 is offline   Reply With Quote
Old 12-23-2016, 12:54 PM   #3
bird6246
Getting Wild
E-Z-GO
 
Join Date: Sep 2016
Location: Bel Air, MD
Posts: 140
Default 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
bird6246 is offline   Reply With Quote
Old 12-23-2016, 01:37 PM   #4
JohnnieB
Techno-Nerd
 
JohnnieB's Avatar
E-Z-GO
 
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
Default 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.
JohnnieB is offline   Reply With Quote
Old 12-23-2016, 03:12 PM   #5
LBB
Not Yet Wild
 
LBB's Avatar
 
Join Date: Nov 2016
Posts: 44
Default Re: 215/30-12 tires vs 215/50, benefits and dangers?

Thanks guys. Your feedback is helpful.

Quote:
Originally Posted by JohnnieB View Post
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 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.
So this would seemingly answer one of my other questions - that the speed increase with the 50's would be more than the low profile 30's?

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?
LBB is offline   Reply With Quote
Old 12-23-2016, 11:12 PM   #6
surferd15
Not Yet Wild
 
surferd15's Avatar
E-Z-GO
 
Join Date: Apr 2016
Location: South Florida
Posts: 63
Default 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.
surferd15 is offline   Reply With Quote
Old 12-24-2016, 12:27 AM   #7
LBB
Not Yet Wild
 
LBB's Avatar
 
Join Date: Nov 2016
Posts: 44
Default Re: 215/30-12 tires vs 215/50, benefits and dangers?

Quote:
Originally Posted by surferd15 View Post
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.
This is cool tool. For the Original Tire Size boxes, what would I put? I'm having trouble finding what the specs would be for a standard tire.
LBB is offline   Reply With Quote
Old 12-24-2016, 09:55 AM   #8
JohnnieB
Techno-Nerd
 
JohnnieB's Avatar
E-Z-GO
 
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
Default Re: 215/30-12 tires vs 215/50, benefits and dangers?

Quote:
Originally Posted by LBB View Post
Thanks guys. Your feedback is helpful.

So this would seemingly answer one of my other questions - that the speed increase with the 50's would be more than the low profile 30's?

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?
The Curtis 1206HB controller in your 2014 TXT-48, limits the motor to approximately 4400RPM, which is 18.9MPH. You say you are getting 19MPH, so your stock tire are slightly taller than 18" or your controller is allowing the motor to spin slightly faster than 4400RPM, or whatever you are using the determine cart speed is reading a bit fast.

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.

Quote:
Originally Posted by LBB View Post
This is cool tool. For the Original Tire Size boxes, what would I put? I'm having trouble finding what the specs would be for a standard tire.
Check the specs in Section-V of the attached Service Manual.
Attached Files
File Type: pdf 48V TXT Service Manual.pdf (4.28 MB, 0 views)
JohnnieB is offline   Reply With Quote
Old 12-24-2016, 07:29 PM   #9
surferd15
Not Yet Wild
 
surferd15's Avatar
E-Z-GO
 
Join Date: Apr 2016
Location: South Florida
Posts: 63
Default Re: 215/30-12 tires vs 215/50, benefits and dangers?

Quote:
Originally Posted by LBB View Post
This is cool tool. For the Original Tire Size boxes, what would I put? I'm having trouble finding what the specs would be for a standard tire.
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.
surferd15 is offline   Reply With Quote
Old 12-25-2016, 12:00 AM   #10
LBB
Not Yet Wild
 
LBB's Avatar
 
Join Date: Nov 2016
Posts: 44
Default Re: 215/30-12 tires vs 215/50, benefits and dangers?

Quote:
Originally Posted by JohnnieB View Post
The Curtis 1206HB controller in your 2014 TXT-48, limits the motor to approximately 4400RPM, which is 18.9MPH. You say you are getting 19MPH, so your stock tire are slightly taller than 18" or your controller is allowing the motor to spin slightly faster than 4400RPM, or whatever you are using the determine cart speed is reading a bit fast.

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.
That pretty much nailed it! Thanks for the explanation.

Quote:
Originally Posted by surferd15 View Post
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.
Thank you. Just what I needed.
LBB is offline   Reply With Quote
Reply
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Electric EZGO


Thread Tools
Display Modes


Similar Threads
Thread Forum
Benefits of HEI conversion? Gas EZGO
Battery dangers. Tell your story. Garage and Workshop
Benefits of a HD solenoid??? Electric EZGO
Dangers of 36v to 48v. HELP!! Electric Club Car
the dangers of sanding Gas Club Car


All times are GMT -5. The time now is 05:52 AM.


Club Car Electric | EZGO Electric | Lifted Golf Carts | Gas EZGO | Used Golf Carts and Parts

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
This Website and forum is the property of Buggiesgonewild.com. No material may be taken or duplicated in part or full without prior written consent of the owners of buggiesgonewild.com. © 2006-2017 Buggiesgonewild.com. All rights reserved.