Here's the low down...

We are competing in EROCC this spring/summer. Classes are split at 36" tires/ 36 and under is legend, 37+ is unlimited. That is the only stipulation between classes (unlike pro-rock).

Now the vehicle:
'97 TJ
5.9L magnum
6" custom suspension
108" wheel base
rev 60's(all disc)
dual detroits
Champion beadlocks

We have either 37" MTR's for unlimited or 36" TSL/SX for legend

Seems to me like we'll hold up in either class. It is looking like the unlimited clas will have more competitors, but we feel confident in the legend class about a good performance.

So what would all of you do?

Also, I'm spotting so any good advice from those who have been there would be appreciated (Lance, etc.). We have secured sponsorship so a good performance would be extremely appreciated. Thanks in advance

For that small difference in tire size, I would stick with the legend class. Are the 60's shaved?

i don't see a reason to run in the higher class for .5" of ground clearence. Is there something i'm missing?

Are the 60's shaved?
Not drastically. Took about 1/4" off and smoothed the lines a little.

i don't see a reason to run in the higher class for .5" of ground clearence. Is there something i'm missing?

No your not missing a thing. It looks (for now) like the unlimited entrants are mainly running 39"+ tires. The event coordinator stated that there has to be a split in classes somewhere so that anyone can enter, he decided on 36". He feels that there are inherent advantages to larger tires.

The main dilemma (sp?) comes from the tires themselves. We really like the Goodyears w/ our motor. They are extremely sticky and have performed well in the past. The SX's just don't seem to grip as well (not quite as soft). We will have to air them down to nothing and lose a little more clearance, where we have ran our goodyears at 14 psi and done well. I also like to see when the big boys get out driven.

Any other opinions? (Info at www.erocc.com (http://www.erocc.com/) )

I compete in UROC, and I'm in about the same situation. UROC sanctions EROCC, and it sounds like they use the same rules. We're going to stick in the Legend class for now. I don't know if the BFG contingency is available in EROCC, but that's what helped us decide to go Legend. They pay the same contingency for each class, so we're just gonna run 35" BFG's(against our better judgement), just so if we do happen to place, there's a little money in it. Not much, but $500 for 3rd, $1000 for 2nd, and $1500 for 1st was enough to sway us into running the BFG's. I say stick where you think you can be somewhat competetive. Once we can make top 5 or 10 fairly consistently in Legend, we'll move up to Unlimited. I know what you mean on the 37's though. It's hard to pull them babies off for a lesser tire.

Also, if you'll notice, for Legend it's 36" measured tire diameter. I have wondered if you could run a set of worn 37" MTR's or BFG's and get in. I guess they measure horizontally with a caliper. It says Unlimited is 37" sidewall designation, so really it could be interpreted either way. With a worn set of 37's you could potentially run either class it looks like to me.

for Legend it's 36" measured tire diameter. I have wondered if you could run a set of worn 37" MTR's or BFG's and get in. I guess they measure horizontally with a caliper. It says Unlimited is 37" sidewall designation, so really it could be interpreted either way. With a worn set of 37's you could potentially run either class it looks like to me.

We were kind of hoping the same thing, but we talked with the organizer and got a big NO. They measure horizontally with a caliper and the 37's would never fit. On top of that he flat out said that they wouldn't allow a 37" designated tire to run in the legend class.

I'll check on the BFG contingency but I'm guessing it's not there. (at least it wasn't mentioned)

Originally posted by bigdude


We were kind of hoping the same thing, but we talked with the organizer and got a big NO. They measure horizontally with a caliper and the 37's would never fit. On top of that he flat out said that they wouldn't allow a 37" designated tire to run in the legend class.

I'll check on the BFG contingency but I'm guessing it's not there. (at least it wasn't mentioned)

Bummer. They really need to reword the rules so it's a little more clear. The way they're written now, you could take it to mean either way.

From the UROC website, and the rules on the EROCC site are the same:

"LEGEND Class Qualifications
36" maximum measured tire diameter, lockers front & rear, winch, seat belts, 6 point roll cage, fire extinguishers (insurance must be current) . This is an abbreviated summary only, the following text contains the vehicle qualifications in detail. All vehicles must pass UROC inspection to compete!

Unlimited Class
37" minimum tire by manufacturer side wall designation (insurance must be current)."


Oh well.

Ryan,

Thanks for pointing that out about the legends being measured and the unlimited being sidewall designation. After the April event I will suggest to the rules committee that we change that wording so that it is less confusing.

There are a two other things that determine your class - You can't have full hydraulic steering in the legends, and you can't have a tube frame in the legends.

Tim
(one of the ERoCC organizers)

Originally posted by Ryan
From the UROC website, and the rules on the EROCC site are the same:

"LEGEND Class Qualifications
36" maximum

Unlimited Class
37" minimum

What if it's somewhere in between? We had the same trouble with MMRA mud racing rules in our street class. Was originally 35" & under for (A) class and 36" up for (B) class. Then, some guy showed up with a tire stamped 35.5" :eek: We changed the (A) class to Less Than 36.0" & (B) stayed the same.

BTW, "Legend" class measures diameter while "Unlimited" uses the stamp? :confused:



TEX

I am going to suggest that we change it to be:

Legend Class: Up to 36" measured diameter.

Unlimited Class: Any DOT approved tire, any size.

Which means that you could run a 35" tire and sign up for the unlimited class. Whether you would want to is another discussion.....

if you run 37s, you'll be up against people that are running 42s. if you stay 36s you'll have the biggest tire in your class. just my .02:beer:

FULLSIZE-

We elected to run the 37's. After trying different combo's on the Jeep we feel like the 37" MT/Rs just plain stick better in rocks than swampers.

Everything on the Jeep's undercarriage is smooth and with HP60's we keep the driveshafts out of harms way also. I think a 37" tire with a well built rig can hang with the shear size of a 40-42" in a competition.

Any other opinions on this:question:

i'll believe a 37 mtr can climb the same as a cut 42 when i see it.:p

If you're running 60's, I would buy a set of 42's and GET IT !!!

first. you could compete in the lower class but who care if you beat a bunch of stock rigs. go Big....like your name suggest


second. get some 38.5 sx

spotting. work your ass off and keep your driver out of trouble. nothing worse than a lazy spotter

Originally posted by camo ]
first. you could compete in the lower class but who care if you beat a bunch of stock rigs. go Big....like your name suggest

Me and BAJG just made a tire decision, and this was the deciding factor.


second. get some 38.5 sx

That's what we did, except we went with TSL's.


Our problem was the front axle. Currently BAJG is running a HP 9" up front, but with the 297x joint. With the CTM's/warn shafts it's not a problem(in theory), but the 39.5's were pushing the limits of the housing itself.

With the CTM's/warn shafts it's not a problem(in theory), but the 39.5's were pushing the limits of the housing itself. [/B]

So what did you do with the 39.5's ? I need them :D

go Big....like your name suggest

hahahaha:D

As the spotter I didn't have the final say in the matter. The name actually is a nickname for my dog. But don't worry I'll be working my 21" pythons all over the place (no bullsh!t I'm ready:) )

Originally posted by BornInAJeep

Me and BAJG just made a tire decision, and this was the deciding factor.



That's what we did, except we went with TSL's.


. [/B]

good call. i would play with the big dogs and loose than to play with the dorks and win. :D


great tire. are you gonna groove it ? i would suggest the pattern like i have on mine. i have wheeled with plenty of mtr equipped rigs and i belive my groved sx work as well if not better. not to mention my sx don't get poped like the radials mtr

Is this TJ here in Tampa? If so, I want to see it! Sounds pretty sweet. I'll give you a call tomorrow. I'm heading to 2001 Space Odyssey with a buddy in a little while.

Later,
K.C.

Originally posted by camo



great tire. are you gonna groove it ?

Yeah probably, waiting for BAJG to get here so we can mount them on the beadlocks. This is how he grooved his old 39.5's.