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40 Series Tires

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jimmy2k

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I'm looking to get some new wheels and tires. I currently run a pretty much stock tmaxx except for bigBore shocks. Is anyone running 40 series tires, and if so, do you notice a drastic decrease in speed & jumping ability due to their size and weight?
 
The 40 series tires are about the same diameter and width as a regular maxx tire. The only size differance is that the 40's are low profile. Meaning the diameter of the wheel it mounts to is larger than normal.

Rob
 
Hey Jimmy -

I run the 40 Series Big Joes on the 40 series wheels and the Big Joes kick ass and are my favorite large off road "all terrain" tire. Common thinking would dictate that larger tires are prefferable for serious jumping as they absorb more of the intital impact. IME this seems to be the case. As for decreased speed, I guess it depends on how you define "drastic"...lol. It's actually the combination of increased mass and increased dimeter that slows your truck down, like running larger wheels on a sports car or larger wheels and tires on a truck. It's all give and take. So, Yes the larger tires slow your truck down some but it's really a moot point as your generally using them for offroad. Also keep in mind that offroad your tires are slipping more and your not topping out your RPMs as much as a high traction surface.

You can't go wrong with Big Joes.

EDIT - FYI, I wouldn't Run 40 series Road rage but regular 2.2's as what's the point on-road.

Peace
 
RobMob is correct.
When measuring a tire a 40 series tire means the sidewall is 40% as tall as the tire is wide. It has nothing to do with the circumference of the tire.
 
umm I'm not so sure about that....
Take for instance these tires.
They are seperated into 2 "types" 40 series and standard tires.

The standard will fit stock maxx, the 40 series "requires 40 series wheels"

http://www.pro-lineracing.com/proline.html

I just got back from the hobby shop and the 40 series are almost 1.5 times wider....
 
Originally posted by FastEddy
RobMob is correct.
When measuring a tire a 40 series tire means the sidewall is 40% as tall as the tire is wide. It has nothing to do with the circumference of the tire.
Click to expand...

I totally agree (why would I disagree..hehe) but IMe the 40 series definitely slow the truck down some for the purpose of this topic.

Peace
 
Here is the difference with Maxx stock tires versus Big Joes:

Maxx Stock -- 5.75" diamter x 3.25" width
Big Joes 40 -- 6.25" diamter x 4.25" width

The Big Joes look much bigger on a truck.
 
Originally posted by RAMTech-RC
Big Joes 40 -- 6.25" diamter x 4.25" width
Click to expand...

What is the measurement from the outside edge of the tread to the bead?
If its built like a car tire and is a true '40' it should be about 1-3/4 inches.

This will be interesting to see.
LMK.
-Ed
 
In real life tire measurements it would be a 30 series tire.
There goes that theory of RC tire measurements. :jet:
 
If you are a bahser then ide say go for it. I just got the 40 series mashers and went up to a constuction site and it was AWSOME!! They gripped on everything and gave me some nice ground clearance. I had been at the same construction sight with the stock tires and it sucked. I couldnt climb any of th hills becuase of lack of traction. I handled the bumps and jumps great with the new tires.
 
My comparisons were being done using 40 series bow ties which I have.
 
I run stock sized tires on my T-Maxx and IMEX JumboMaxx tires on my Savage. The JumboMaxx tires are about the same size as the 40 series (maybe just a hair bigger). All I have to say is that for ground work, the larger tires are nice. For air work (ie jumping and flipping) the larger tires help with the flips (larger rotational mass helps with gyroscopic affect needed to get the truck around) but do not help large jumps (ie getting lots of air under there) because they are on the heavy side. A .21 or larger conversion (talking engines now) can run with the large tires and use them to good advantage, but the .15 sized engines just do not have the oomph necessary to make them really move.
 

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