Largest Tire Size I Can Add with a Lift
- Thread starter Clay49
- Start date
HammerBoss
Member
I just saw a ready lift kit that ran 37 x 13s! I imagine there was cutting involved, but it looks badass.
Baz
Well-known member
With some minor modifications you can run 35x12.5 on a stock Trail Boss. So with a lift 37s would be totally doable.
tommysf13
Active member
2019 TB custom,I am on Cooper 35x12.5x20 (TB stock copy wheels). 1.5 inch Rough Country leveling and 2/3 of the front flaps cut (all 3 mounting screws unaffected). I do get rub fully turned in reverse.
Baz
Well-known member
Did you remove the fender liner bracket?
Photos?
Zone off-road front kit
zoneoffroad.com
Set to 1.75 lift
Method 18x9 -12 backspacing
Nitto Ridge Grappler 35x12.5
Full mudflap and bracket removal
Pulled fender liners back for more clearance
Still rubs at full lock
I have Bilstein 6112/5160 setup on order (for 4 months now
) I will report back when they come
1.75
Specially designed for the 2019-2021 Chevy Trail Boss and GMC AT4 trucks, these kits are designed to a higher standard, working within the parameters of the factory suspension and steering geometry to maximize potential while allowing optimal clearance for larger tires. Kits include strut...
zoneoffroad.com
Set to 1.75 lift
Method 18x9 -12 backspacing
Nitto Ridge Grappler 35x12.5
Full mudflap and bracket removal
Pulled fender liners back for more clearance
Still rubs at full lock
I have Bilstein 6112/5160 setup on order (for 4 months now
) I will report back when they comeAttachments
tommysf13
Active member
Baz
Well-known member
All the cool kids are doing it man 
Zone off-road front kit
1.75
Specially designed for the 2019-2021 Chevy Trail Boss and GMC AT4 trucks, these kits are designed to a higher standard, working within the parameters of the factory suspension and steering geometry to maximize potential while allowing optimal clearance for larger tires. Kits include strut...
Set to 1.75 lift
Method 18x9 -12 backspacing
Nitto Ridge Grappler 35x12.5
Full mudflap and bracket removal
Pulled fender liners back for more clearance
Still rubs at full lock
I have Bilstein 6112/5160 setup on order (for 4 months now
Do you think that if you have would have went with 17x9 or 17x8.5 you would have a rubbing issue still? And where are you still rubbing even after the trimming?Zone off-road front kit
1.75
Specially designed for the 2019-2021 Chevy Trail Boss and GMC AT4 trucks, these kits are designed to a higher standard, working within the parameters of the factory suspension and steering geometry to maximize potential while allowing optimal clearance for larger tires. Kits include strut...
Set to 1.75 lift
Method 18x9 -12 backspacing
Nitto Ridge Grappler 35x12.5
Full mudflap and bracket removal
Pulled fender liners back for more clearance
Still rubs at full lock
I have Bilstein 6112/5160 setup on order (for 4 months now
LianaD123
New member
Do you have more photos?Zone off-road front kit
1.75
Specially designed for the 2019-2021 Chevy Trail Boss and GMC AT4 trucks, these kits are designed to a higher standard, working within the parameters of the factory suspension and steering geometry to maximize potential while allowing optimal clearance for larger tires. Kits include strut...
Set to 1.75 lift
Method 18x9 -12 backspacing
Nitto Ridge Grappler 35x12.5
Full mudflap and bracket removal
Pulled fender liners back for more clearance
Still rubs at full lock
I have Bilstein 6112/5160 setup on order (for 4 months now
vezePilot
Well-known member
This guy discovered that running 35 inch tires on his Trail Boss seriously overheated his transmission. You may find that switching to tires of that size will also require re-gearing your final drive. It depends on what your current gearing is. His was geared with a 3.42 rear end. Mine is also a 3.42 for the stock 32 inch 265/70R20 tires.
Trail Brian
Active member
I looked up my 6.2 and it has a 3.23 rear end...
I'm wondering If its really his tires... ? not sure its all that different from towing ? off topic but my last 5.3 with 6 speed after its tranny service overheated after that... two dealerships' couldn't figure it out ... it had a 3.23 rear as well... wrong fluid ? there are three different type fluids with any of these combinations hmmmm....
I'm commenting on this as I am in the process of picking out a 4 inch lift and wasn't really considering the rear end up till now, none of the articles mention anyone swapping gears like the old days for example...
I'm wondering If its really his tires... ? not sure its all that different from towing ? off topic but my last 5.3 with 6 speed after its tranny service overheated after that... two dealerships' couldn't figure it out ... it had a 3.23 rear as well... wrong fluid ? there are three different type fluids with any of these combinations hmmmm....
I'm commenting on this as I am in the process of picking out a 4 inch lift and wasn't really considering the rear end up till now, none of the articles mention anyone swapping gears like the old days for example...
In the “old” days the trucks came with really small tires and transmissions with
2-3 or 4 gears. Adding big tires really affected the ratios.
Going from 32” to 35” tires ( about 8% increase in circumference) on a truck with plenty of HP / TQ and 10 gears, shouldn’t be a problem.
2-3 or 4 gears. Adding big tires really affected the ratios.
Going from 32” to 35” tires ( about 8% increase in circumference) on a truck with plenty of HP / TQ and 10 gears, shouldn’t be a problem.
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