Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum banner

1 - 20 of 679 Posts

·
Registered
2004 chevy trailblazer_ls
Joined
·
97 Posts
Discussion Starter #1
If someone, somewhere, somehow could come up with a sticky chart breaking down 'possible tire fit' by "Wheel Size", "Body Lift Needed?", "Suspension Lift Needed?", "Spacers Needed?" and "Custom Mods Needed?" those of us who aspire to go for lifts/tires may be able to quit asking about our specific setup (ahem...I have 16's, planning the BDS suspension lift, open to spacers, and am totally confused :crazy::duh:)...

As a bonus, does anybody have a good explanation of how height and width affect the need for spacers and lifts? too wide needs a spacer to clear the ball joint and a lift to keep from rubbing the wheel well on compression, and too tall needs a lift to keep from rubbing the wheel well on compression and spacers to keep from rubbing wheel well on turns? It looks like /75 is the beginning of spacer requirements, 275/16 and 275/17 starts to need a suspension lift, and 285+ needs both lifts? Am I on to anything here? :worried: I'll update as I can to keep bad info off the top of the thread...


Here's the information I could gather, assuming stock wheels :)hail:Thanks to Clayton and The Roadie!):

16"

265/75/16 - needs spacers

285/75/16 (33") - needs spacers, new wheels, suspension and body lifts, cutting/hammering to fit

17"

255/65/17 - OK w/ no lift, spacers, or mods

255/70/17 - needs upper ball joint mod, possible hammering to fit

255/75/17 - needs spacers, upper ball joint mod, possible hammering to fit

265/70/17 - needs spacers, upper ball joint mod, definite cutting/hammering to fit

285/70/17 (33") - needs spacers, new wheels, suspension and body lifts, cutting/hammering to fit

305/70/17 (34") takes all of the above, plus total dedication to being *the* tallest TB of us all. (JamesDub)

:thx:thx
 

·
Registered
2006 chevy trailblazer_ls
Joined
·
145 Posts
if it is all ultimate then we need to see some specs on 18's and 20's....like the 285/65/18 or the 285/55/20.... I would imagine some are considering those as well...
 

·
Registered
2002 chevy trailblazer_ls
Joined
·
4,125 Posts
if it is all ultimate then we need to see some specs on 18's and 20's....like the 285/65/18 or the 285/55/20.... I would imagine some are considering those as well...
considering yes but no one has posted any info about those
 

·
Banned
2004 gmc
Joined
·
26,181 Posts
I would be shocked and call BS if anybody claims they seriously offroad with 18"+ wheels on trailvoys. Lifted for bling, maybe. But that would be better left for the Appearance forum, not this one.
 

·
Registered
2006 chevy trailblazer_ls
Joined
·
859 Posts
18"

265/65/18

No spacers and plenty of clearance. For street and light off road (mine is not 4x4)...
 

·
Registered
2004 chevy trailblazer_ls
Joined
·
97 Posts
Discussion Starter #6
if it is all ultimate then we need to see some specs on 18's and 20's....like the 285/65/18 or the 285/55/20.... I would imagine some are considering those as well...
The blingery is down the hall...Only muddy ones with lotsa rubber here...:yes:

I guess 'ultimate' was a stretch, born out of frustration with the dozens of 'what about this tire?' threads in the offroad forum. Not so ultimate--just how tires fit on stockers with and without lifts/spacers/cutting/hammering.

Any idea why I can't go back and edit the starter post?
 

·
Registered
2002 chevy trailblazer_ltz
Joined
·
236 Posts
FYI: I have 265/70/17 General grabbers and they fit with no rubbing. All I have is wheel spacers, and BDS suspension lift. I never had to do a upper ball joint mod and I didn't cut or hammer anything.
 

·
Registered
2006 chevy trailblazer_lt
Joined
·
398 Posts
FYI: I have 265/70/17 General grabbers and they fit with no rubbing. All I have is wheel spacers, and BDS suspension lift. I never had to do a upper ball joint mod and I didn't cut or hammer anything.
Second that...no grinding, spacers give you the clearance there. I tried without spacers and I would have to grind down everything there was on the upper ball joint to get enough clearance.
 

·
Registered
2006 chevy trailblazer_ls
Joined
·
145 Posts
just a thought.... i have a friend with a jeep with 33's and 20s and he is always in the mud but most of the guys here are on 18 with 35's or 20's with 38's
 

·
Banned
2004 gmc
Joined
·
26,181 Posts
In mud you don't air down, as I understand it, so it's all in the tread block design. Since trailvoys aren't good mudders, my advice if you're going to air down for sand or rocks is to have the maximum sidewall possible. Here's a pic of a Jeep with 39s on 15"



All depends on your mission.
 

·
Registered
Joined
·
104 Posts
If you're going to off road with 20's you better be running 40's or larger! I've seen guys ruin their 20's, which they run on 37" tires, very easily. If you off road, you want to protect your wheels (valve stems, beads) by having as much sidewall as possible. Even if you don't air down.
 

·
Registered
2006 chevy trailblazer_ls
Joined
·
1,268 Posts
17"
285/70/17 (33") - needs spacers, new wheels, suspension and body lifts, cutting/hammering to fit
I run 285/70/17- I wouldn't have needed Spacers with 23mm offset wheels..
I just put them on to give a little extra room. And I only have a suspension lift (BDS)
 

·
Registered
2002 gmc envoy_slt_xl
Joined
·
206 Posts
I just got my 265/70/17 General grabbers at2's put on today and i have a 2"BDS body lift and 1.5" wheel spacers and i still had to do a little hammering and some cutting. Also i have an Envoy XL and ive herd the Envoy's have a little less room then the TB's.
 

·
Banned
2004 gmc
Joined
·
26,181 Posts
I agree Envoys have a differently shaped front bumper, and it's closer to the tire. (No longer a problem for me, you know. :D )I was giving advice for a year to members going to 265s, and the Envoy owners said I was right, and the TBs said I was scaring them with stories of cutting they found unnecessary.

I believe the rear edge is the same, and the BFH is still necessary on both kinds.

Forgot you had a weiner dog XL. I think there are three of you now wheeling long wheelbases. (I don't count the mall cruisers who post in those other forums. :weird: )

 

·
Registered
chevy
Joined
·
1,797 Posts
Here's the information I could gather, assuming stock wheels :)hail:Thanks to Clayton and The Roadie!):

16"

265/75/16 - needs spacers

285/75/16 (33") - needs spacers, new wheels, suspension and body lifts, cutting/hammering to fit


17"

255/65/17 - OK w/ no lift, spacers, or mods

255/70/17 - needs upper ball joint mod, possible hammering to fit

255/75/17 - needs spacers, upper ball joint mod, possible hammering to fit

265/70/17 - needs spacers, upper ball joint mod, definite cutting/hammering to fit


:thx:thx
Is there really that much defference in the 16" early models and the 17" later models? Or, have you guys just done more work with 17" wheels than the 16"? Not pointing fingers, just curious. I don't have a lift or spacers and I'll be getting a set of 255/75/16's at tax time, can't remember the name of them right now:suicide:, but I like the A/T tread that they had. If no one has done this, I'll let you guys know how they fit.
 

·
Banned
2004 gmc
Joined
·
26,181 Posts
Is there really that much defference in the 16" early models and the 17" later models? Or, have you guys just done more work with 17" wheels than the 16"?
Except for the wheels, there are no other suspension differences among the years. Older trucks are more likely to be modded aggressively for offroad because very few folks want to put new ones at risk of being damaged, but that means more 17" owners are upgrading their tires for looks and there's more of them out there.

Teebes, AlekG and I all went to 6X5.5" style wheels, and we could have almost any kind of wheel out there in that bolt pattern, 16", 17", or 18" diameter, and we coincidentally ALL chose 16" because you get the most sidewall ratio when the wheel is smaller, and we ALL go aggressively offroad where airing down to 15-18 PSI is very useful (or even essential) so the 16" choice was functional.
 

·
Registered
chevy
Joined
·
1,797 Posts
and we coincidentally ALL chose 16" because you get the most sidewall ratio when the wheel is smaller, and we ALL go aggressively offroad where airing down to 15-18 PSI is very useful (or even essential) so the 16" choice was functional.
I don't think I'll ever be in a situation where I'll need to air them down, but aggressive offroading IS in the future.

Don't slap me with the "Mall Rated" sticker just yet, the TB is still the family vehicle for now. So I won't have any aggressive offroading pics just yet, but offroading it will go!
:woot:
 

·
Registered
chevy
Joined
·
1,797 Posts
:hissy::hissy: They can't order the ones I want in 255/75, so I guess I'll have to settle for the 255/70/R16's....:hissy::hissy:

I know I could get something like them somewhere else, but they are the best looking ones that Wal-Mart has. My wife works there, so we'll be using the discount on them!:woot:
 

·
Registered
Joined
·
43 Posts
Ok guys shopping for new tires right now 02 envoy xl does see some moderate off-road use and has surprised me with were it will go being so low and long. I am wondering if the 255/65/17's will fit on with no major mod's, hammering the brackets and a bit of grinding on the ball joint is fine by me but no fender trimming untill I get a new bumper cover then the old one is going to be modified for running off-road it's already cracked so it will take some of the pain out of trail damage :D. I do plan on the bds suspension lift but not for a while yet in the summer time mayby but well it need's new tires now and the factory ones just look so small on the large truck. I know there are a few differences in the swb to the lwb trucks that's why I am asking thanks :)
 
1 - 20 of 679 Posts
Top