Wheel Fitment and Backspace

Kirbyt100 · 10-13-2009, 10:16 PM

Hey guys I was wondering what's the best backspace to go with the T... I'm going with a 15/8 Pro Comp Rock Crawlers but I have no clue with the backspace... Im currently riding on stock wheels with bfg all terrains 32/11.5/15's! I want it to be poking out a bit also... Please can someone post some pics of how it would look.Thanks

This ad is not displayed to registered members.
Register your free account today and become a member on Yotatech!

4Crawler · 10-14-2009, 09:00 AM

You can easily measure the back spacing on the wheels you have and go from there:
- http://www.4crawler.com/4x4/CheapTri...ne_Pix/24.html

And how does back spacing and wheel width affect track width?
- http://www.4crawler.com/Diesel/Tires...ningTrackWidth

tj884Rdlx · 10-14-2009, 10:10 AM

11.5s will stick out on either backspace available. the lower the number, the farther they will stick out. i went with 3.5 on my 15x8s and with 10.5" skins they just come outside the fender well. you'll have another inch of rubber.

bear in mind when turning full lock you may rub the outer edge of the tire if you don't have some lift

Kirbyt100 · 10-14-2009, 02:52 PM

Quote:

Originally Posted by tj884Rdlx

11.5s will stick out on either backspace available. the lower the number, the farther they will stick out. i went with 3.5 on my 15x8s and with 10.5" skins they just come outside the fender well. you'll have another inch of rubber.

bear in mind when turning full lock you may rub the outer edge of the tire if you don't have some lift

so whats the best backspace for me without me rubbing

4Crawler · 10-14-2009, 03:01 PM

The closer the backspacing is to stock the less likely the tires are to rub. Why? The closer the wheels/tires are to the body, the smaller the arc they sweep out while steering and it is when that arc of the tire intersects the arch of the wheel well that you have rubbing:
- http://www.4crawler.com/4x4/ForSale/...it.shtml#FAQ10

tj884Rdlx · 10-15-2009, 02:06 PM

well, the catch with that width tire is without some lift, you may rub regardless of back space.

if you have a smaller backspace, like 3.5", you move the wheel out, and can rub the outer edge of the tire. with a 4.25" backspace, you risk rubbing the inside edge of the tire. it depends on your lift, if any, and the actual size of the tire, which varies by manufacturer regardless of the size they "name" it.

do you have any lift at all?

Matt3203 · 10-15-2009, 06:18 PM

this is a t100 here not a pickup

t100s can fit 33s with tbar crank

Kirbyt100 · 10-15-2009, 06:41 PM

Quote:

Originally Posted by tj884Rdlx

well, the catch with that width tire is without some lift, you may rub regardless of back space.

if you have a smaller backspace, like 3.5", you move the wheel out, and can rub the outer edge of the tire. with a 4.25" backspace, you risk rubbing the inside edge of the tire. it depends on your lift, if any, and the actual size of the tire, which varies by manufacturer regardless of the size they "name" it.

do you have any lift at all?

No lift... stock rims... BFG ALL T.

Kirbyt100 · 10-15-2009, 06:43 PM

so im thinking of purchasing the cragar soft 8's 15/8 4 inch backspacing...

tj884Rdlx · 10-17-2009, 11:09 PM

aw jeez, my bad. i did not see T100. if you do go with soft 8's, i can recommend summit racing for price. i got mine there for $40 each i believe. i was able to pick them up at the local store though.

93yotaSR5 · 11-11-2009, 08:02 PM

I have 31x10.5x15. Should I get 4 or 3.75 in back spacing? I have a 4crawler 1" body lift on the way.

4Crawler · 11-11-2009, 08:05 PM

Either will work, stock is around 4.75" so your tires will be sticking out wider than they do now.

10-14-2009, 09:00 AM	#2 (permalink)
4Crawler Contributing Member Join Date: Jun 2002 Location: SF Bay Area, CA Posts: 7,828	You can easily measure the back spacing on the wheels you have and go from there: - http://www.4crawler.com/4x4/CheapTri...ne_Pix/24.html And how does back spacing and wheel width affect track width? - http://www.4crawler.com/Diesel/Tires...ningTrackWidth __________________ 1985 Toyota 4Runner SR-5, 22REC engine, dual t-cases, 4.88 gears, dual ARBs, 33x10.50 BFGs or 35x12.50 MTRs r.c.brown@ieee.org TruckEditor@tlca.org Project: 4Crawler 4Crawler OffRoad Gettin'Off 4WD Club

10-14-2009, 10:10 AM	#3 (permalink)
tj884Rdlx Registered User Join Date: Apr 2007 Location: ATL! Posts: 514	11.5s will stick out on either backspace available. the lower the number, the farther they will stick out. i went with 3.5 on my 15x8s and with 10.5" skins they just come outside the fender well. you'll have another inch of rubber. bear in mind when turning full lock you may rub the outer edge of the tire if you don't have some lift __________________ 88 4Runner DLX, 15x8 soft8s w/ BFG 33x10.5 A/Ts. 1.5" SDORI spacers, OME CS009s, 1" 4crawler b.l., original Canback top

10-14-2009, 03:01 PM	#5 (permalink)
4Crawler Contributing Member Join Date: Jun 2002 Location: SF Bay Area, CA Posts: 7,828	The closer the backspacing is to stock the less likely the tires are to rub. Why? The closer the wheels/tires are to the body, the smaller the arc they sweep out while steering and it is when that arc of the tire intersects the arch of the wheel well that you have rubbing: - http://www.4crawler.com/4x4/ForSale/...it.shtml#FAQ10 __________________ 1985 Toyota 4Runner SR-5, 22REC engine, dual t-cases, 4.88 gears, dual ARBs, 33x10.50 BFGs or 35x12.50 MTRs r.c.brown@ieee.org TruckEditor@tlca.org Project: 4Crawler 4Crawler OffRoad Gettin'Off 4WD Club

10-15-2009, 02:06 PM	#6 (permalink)
tj884Rdlx Registered User Join Date: Apr 2007 Location: ATL! Posts: 514	well, the catch with that width tire is without some lift, you may rub regardless of back space. if you have a smaller backspace, like 3.5", you move the wheel out, and can rub the outer edge of the tire. with a 4.25" backspace, you risk rubbing the inside edge of the tire. it depends on your lift, if any, and the actual size of the tire, which varies by manufacturer regardless of the size they "name" it. do you have any lift at all? __________________ 88 4Runner DLX, 15x8 soft8s w/ BFG 33x10.5 A/Ts. 1.5" SDORI spacers, OME CS009s, 1" 4crawler b.l., original Canback top

10-15-2009, 06:18 PM	#7 (permalink)
Matt3203 Registered User Join Date: Jul 2009 Location: Columbus GA Posts: 60	this is a t100 here not a pickup t100s can fit 33s with tbar crank __________________ 1994 Toyota T100 reg. cab, V6, 5spd, 4wd, 32x11.5 maxxis bighorns on cragar soft 8s

10-15-2009, 06:43 PM	#9 (permalink)
Kirbyt100 Registered User Join Date: Oct 2009 Location: Houston Posts: 5	so im thinking of purchasing the cragar soft 8's 15/8 4 inch backspacing...

10-17-2009, 11:09 PM	#10 (permalink)
tj884Rdlx Registered User Join Date: Apr 2007 Location: ATL! Posts: 514	aw jeez, my bad. i did not see T100. if you do go with soft 8's, i can recommend summit racing for price. i got mine there for $40 each i believe. i was able to pick them up at the local store though. __________________ 88 4Runner DLX, 15x8 soft8s w/ BFG 33x10.5 A/Ts. 1.5" SDORI spacers, OME CS009s, 1" 4crawler b.l., original Canback top

11-11-2009, 08:02 PM	#11 (permalink)
93yotaSR5 Registered User Join Date: Sep 2009 Location: sacramento ca Posts: 185	I have 31x10.5x15. Should I get 4 or 3.75 in back spacing? I have a 4crawler 1" body lift on the way. __________________ 93 xtra cab, 3vze, 5speed, 31x10.5x15 bfg M/T KM2 hella 500ff. cobra cb, front and rear diff breather mod, many more coming!

11-11-2009, 08:05 PM	#12 (permalink)
4Crawler Contributing Member Join Date: Jun 2002 Location: SF Bay Area, CA Posts: 7,828	Either will work, stock is around 4.75" so your tires will be sticking out wider than they do now. __________________ 1985 Toyota 4Runner SR-5, 22REC engine, dual t-cases, 4.88 gears, dual ARBs, 33x10.50 BFGs or 35x12.50 MTRs r.c.brown@ieee.org TruckEditor@tlca.org Project: 4Crawler 4Crawler OffRoad Gettin'Off 4WD Club

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search