HeavyD99

iTrader: (15)

http://www.amainhobbies.com/rc-cars-...408blk/p441103

Google is your friend

A2Racing

iTrader: (7)

I appreciate your reply but I have the 9mm hex adapters and when I put the PL wheels on there is barely any thread for the wheel nuts which is why I was asking about the 7mm adapter.

I googled and tried to researched all this before posting my questions and asking for other racer's help.

Thanks again though

MaricopaAgent

iTrader: (28)

are you sure they are pushed on all the way?

are you using the nylock wheel nuts or the factory serrated ones? I have yet to have a rear tire not fit.

with 7mm hex, I can run serrated nuts no problem on the rear. Maybe a pic?

gticlay

iTrader: (14)

Do you know what width hex is correct for those two wheels? I need to know!

Tijuana_Taxi

iTrader: (4)

On Exotek's website it gives you approximate widths with the different wheels and their hexes. I've had great luck with their products.

http://www.exotekracing.com/xb4-12mm...ar-2-7mm-wide/

gticlay

iTrader: (14)

I saw that - but what is the stock width? The one that says AE/Kyosho with the same measurement must be referring to the back? Should say AE/Kyosho/TLR/Serpent/everyone.

lomar15

I run the 9mm exotek hexes with tlr22 wheels, width is in spec and axle just protrudes from wheel nut.
fronts I run 5mm hobbyking hexes with 22-4 wheels you will be at 245mm width,
with b42.2 wheels you will be exactly 250mm. and axle is flush with nut.

J-milz

iTrader: (42)

Anybody upgrade their older xb4's to the new 2015 style shorty lipo chassis? I have a 13' that I'd like to update. A parts list would be awesome. Thx in advance.

ResultsRC

iTrader: (1)

Can some of guys that have no issue with gears list slipper settings and type of track surface and jumps there.

Bentka what are u looking for specifically to know either was over tightened and caused issue ?

seth556

iTrader: (43)

Make sure all 4 screws are actually in the bulkhead cover. I forgot the bottom two one time and had my gears slip, otherwise I've never had any issues.

6.5t, slipper very tight, ultra high traction clay (almost no tire slippage anywhere), and no diff shims.

suby723

iTrader: (21)

Your not supposed to set your slipper tight, that is the issue. 0-1mm is where I have mine set to. On the 16 car 0mm is perfect, that is what all the team members where running at yatabe.

BentKa

We run mostly on high to very high grip astro and carpet with either center diff with 1.000.000 cst diff grease or slipper usually set to 0-0.5mm gap.

On low to medium grip clay or dirt we run either center diff with 500.000 cst diff grease or slipper usually set to 0mm gap.

You can feel relatively easy if the screws for either the bulkhead cover or diff housing have been over-tightened.

They should come to a noticeable stop when tightened all the way down.

One mistake a lot of people do is use an electric screw driver on too high of a speed and torque setting.
Too high of a speed will heat up both the screw and plastic resulting in expanded threads. This combined with over-tightening will quickly ruin the threads.

When using an electric screw driver I always use the low speed setting and only tighten down to 90% and then do the remaining 10% by hand to ensure not to over-tighten.

For the diff housing and the smaller screws I find these to have been over-tightened in 9 out of 10 cases.
This combined with overfilling the diff will allow the diff to expand as pressure and heat builds up. This expansion will have the same result as shimming the bevel gear 0.2-0.3 mm away from the pinion gear resulting in excessive wear on the gears and in the end stripping of the gears.

Xray have added material where the bearings rest to withstand the forces trying to expand the diff and thereby "pressing" and holding the diff together.
But with the forces applied to these relatively small gears something unfortunately have to give in the end.

People are in most cases also running their slippers way too tight which only adds to the forces applied as well as making the XB4 that much harder to drive.

The slipper is a fantastic tuning aid and should really be given just as much consideration as shock oils and tires but people tend to just "set and forget"……….

Bent

Gertsch

after 5 years of hot bodies (D8/D812/D413) i switched the first time to xray.
the XB4_16 looks amazing and i had the possibility to test the XB4_15 on my local track a few times and really liked it.

right now i just have one question:

are there yellow xray wheels with 14mm hex coming in the near future?
we all know that yellow wheels are way faster than the white ones

cheers

BentKa

Sorry….no plans for any yellow Xray wheels.

Your best bet would be to go with 12mm wheels from another brand instead

We run the softer 12mm Xray wheels for more grip but they only come in white.

Bent

Gertsch

ok, thanks a lot for the fast feedback!