What tires for 3.91 gears?

naetzker · 12-16-2006, 08:34 AM

Just bought a 2001 tacoma and from searching these forums discovered why I am getting such good gas mileage-3.91 gears.
A little dissapointed in the fact I cannot run the american racing 16" wheels I scored on ebay, but with the price of gas I cannot justify changing gears just to run bigger wheels.
All that said, what tires would you reccomend for a 4wd tacoma with 3.91 gears??

KyleT · 12-16-2006, 09:23 AM

why wont the wheels fit?

naetzker · 12-16-2006, 09:26 AM

wheels would fit, but from what I have read here the larger wheel/tires would be a problem for the 3.91 gears.
just wondering if theres a middle ground, from the stock 225/75/15, that would not have a negative effect on the stock gears.

eric-the-red · 12-16-2006, 09:51 AM

I run 275/75R16 tires on 16" wheels with 3.73 gears on my 01 4Runner, 3.4 V6 engine. It originally came with 225/75R15. The mileage didn't change all that much, I don't have exact numbers but just going by the distance between fill ups I would say less than 10% drop. I did lose some acceleration, but it wasn't as much as I thought it would be.

pmbazus · 12-16-2006, 05:19 PM

Are you sure you have 3.91 gears? I have a 2004 Tacoma with 3.91 gears and the stock tires were 265 70 16 on 16 inch rims. I currently run 265 75 16 tires with a 2.5 inch lift and I don't notice a power loss. If you do have 3.91 gears you are OK to use the 16 inch wheels

naetzker · 12-17-2006, 06:27 AM

Yup, I think I do have the 3.91 gears. My axle code is B06A, from everything I can find it means 8", 3.91, 2 pinion. Wimpy eh? I do like the great gas mileage though.
pmbazus, do have the V6?

pmbazus · 12-17-2006, 04:40 PM

I have the 2.7

pmbazus · 12-17-2006, 04:51 PM

Use your 16 inch wheels and get some 265 70 16 tires. Much better.

naetzker · 12-17-2006, 06:55 PM

thanks again!

jjrgr21 · 12-17-2006, 07:57 PM

i ran 31/10.50's on a 98' taco that came stock with 225/75/15's, it ran fine for over 200k miles with no issues at all.

12-16-2006, 08:34 AM	#1 (permalink)
naetzker Registered User Join Date: Dec 2006 Posts: 7	What tires for 3.91 gears? Just bought a 2001 tacoma and from searching these forums discovered why I am getting such good gas mileage-3.91 gears. A little dissapointed in the fact I cannot run the american racing 16" wheels I scored on ebay, but with the price of gas I cannot justify changing gears just to run bigger wheels. All that said, what tires would you reccomend for a 4wd tacoma with 3.91 gears??

12-16-2006, 09:23 AM	#2 (permalink)
KyleT Registered User Join Date: Sep 2005 Location: Fort Worth, TEXAS Posts: 1,092	why wont the wheels fit? __________________ - Kyle Former Owner of - 1996 Sunfire Red Metallic 4Runner Limited updated 10/31/06 OEM/TRD Lift Kit #1 from Sonoran Steel with 1 Top-out spacer - Lexus GX470 rims - 295/70r17 Nitto Terra Grapplers Yukon 4.88's, E-Locked Rear, Waiting to blow up front diff #2

12-16-2006, 09:51 AM	#4 (permalink)
eric-the-red Contributing Member Join Date: Oct 2003 Location: Port Coquitlam, BC Posts: 2,217	I run 275/75R16 tires on 16" wheels with 3.73 gears on my 01 4Runner, 3.4 V6 engine. It originally came with 225/75R15. The mileage didn't change all that much, I don't have exact numbers but just going by the distance between fill ups I would say less than 10% drop. I did lose some acceleration, but it wasn't as much as I thought it would be. Last edited by eric-the-red : 12-17-2006 at 11:06 AM.

12-16-2006, 05:19 PM	#5 (permalink)
pmbazus Registered User Join Date: Sep 2004 Location: Phoenix AZ Posts: 48	What tires for 3.91 gears? Are you sure you have 3.91 gears? I have a 2004 Tacoma with 3.91 gears and the stock tires were 265 70 16 on 16 inch rims. I currently run 265 75 16 tires with a 2.5 inch lift and I don't notice a power loss. If you do have 3.91 gears you are OK to use the 16 inch wheels

12-17-2006, 06:27 AM	#6 (permalink)
naetzker Registered User Join Date: Dec 2006 Posts: 7	Thanks for the advice! Yup, I think I do have the 3.91 gears. My axle code is B06A, from everything I can find it means 8", 3.91, 2 pinion. Wimpy eh? I do like the great gas mileage though. pmbazus, do have the V6?

12-16-2006, 09:26 AM	#3 (permalink)
naetzker Registered User Join Date: Dec 2006 Posts: 7	wheels would fit, but from what I have read here the larger wheel/tires would be a problem for the 3.91 gears. just wondering if theres a middle ground, from the stock 225/75/15, that would not have a negative effect on the stock gears.

12-17-2006, 04:40 PM	#7 (permalink)
pmbazus Registered User Join Date: Sep 2004 Location: Phoenix AZ Posts: 48	I have the 2.7

12-17-2006, 04:51 PM	#8 (permalink)
pmbazus Registered User Join Date: Sep 2004 Location: Phoenix AZ Posts: 48	Use your 16 inch wheels and get some 265 70 16 tires. Much better.

12-17-2006, 06:55 PM	#9 (permalink)
naetzker Registered User Join Date: Dec 2006 Posts: 7	thanks again!

12-17-2006, 07:57 PM	#10 (permalink)
jjrgr21 Registered User Join Date: Aug 2006 Location: Maryland Posts: 1,414	i ran 31/10.50's on a 98' taco that came stock with 225/75/15's, it ran fine for over 200k miles with no issues at all. __________________ 2003 4WD TRD Tacoma 1986 4Runner

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