Can you mix Ag' and R4's

thclimer · Tuesday at 7:00 PM

I apologize if this has been asked before.

I have a friend with a Kubota L235 (about 40-years old) one of his front tires developed a sever sidewall leak. He currently has Ag tires on the rear and front (6-14, 4PR) and was wondering if he could replace both fronts with a R4 style tire while keeping rear tires as Ag’s. His tractor is 4-wheel drive.

If he can use R4's on the front what would the tire size be?

grsthegreat · Tuesday at 7:06 PM

Mixing R1 and R4 tires. Already read many posted. Here's some more info on possibles

Hello, I've been reading as many posts on the topic of mixing R1 and R4 tires. Specifically, I'm interested in running an R1 rear with R4 front. From the Titan data book, I looked up tire data on both. I have a 2013 DK45SE, so these numbers are specific to the tires I can run. R1 tires Front...

www.tractorbynet.com

RayIN · Wednesday at 8:56 PM

The important measurement is the circumference of the tires, the same ratio between front and rear must be maintained to avoid expensive problems. Printed tires sizes are rim diameter only.
IMO it's time to grab a tape measure and do your homework.

thclimer · 2025-07-24T05:56:09-0400

He decided to replace both front's with R1's and tubes as it originally had.

Gator6x4 · 2025-07-24T21:05:12-0400

thclimer said:
He decided to replace both front's with R1's and tubes as it originally had.

Probably a wise decision.

For a Kubota L235 4-wheel drive tractor, the standard front tire size is 4.00-15, and the standard rear tire size is 9.5-24. The 4WD system utilizes a front axle that is significantly different from the 2WD version, according to a Kubota parts website.

Detailed Tire Information:

Front Tires: The standard front tires are sized as 4.00-15.
Rear Tires: The standard rear tires are 9.5-24.
4WD System: The L235 4WD has a unique front axle design that allows for better traction and maneuverability in challenging conditions. When in 4WD, the front and rear wheels work together, and a differential lock can be engaged to provide even more traction when needed according to a YouTube video on Kubota tractors.