Glad to hear you are looking to try the Pro One tires! For 13.5 I recommend using Green rears with Team Purple fronts, but you might end up liking magenta or pink fronts more. I find the TP fronts to be a bit edgy up front but retain steering throughout the run without bogging down like the magentas do. You can try other rears, but blues will likely lock the rear in too much. Don't be afraid to try pinks or magentas, either.

A normal arbor is fine for the Pro One fronts, but you will need the Pro One arbor to true the rears.

I have never run a 10.5 or a 7.5, but let's try some deduction here. If I run ~40 mm rollout with a 3.5 or 4t motor, ~85 mm rollout with a 13.5t motor, and ~95 mm with a 17.5t, why not try ~70 mm with the 10.5t and ~55 mm with the 7.5t? You will want to start looking at speedo temps with the 7.5t, by the way, although my guess is that most speedos should handle it just fine.

Thanks for the quick response. Will order some up and give them a try.

I split the rear axle on my X-ray, so, got to get a new axle anyways, might as well try something different. RC Discount the best place to get Pro One?

Forgot to ask, what diff. rings fit the pro one axle? (can I use the X-ray rings)and what wheel bolts?

discountrcstore.com is the source.

the hubs use 4-40 cap screws and the standard diff ring like IRS or AE. I don't know if Xray was dopey enough to make a non-standard diff ring, but worst case a pair of AE diff rings shouldn't be more than $3

Does anyone know the ulti equivalent for bsr blue, green and black?

blue is similar to xmedium. green is similar to xsoft. black i dunno.

Thanks Andrew. Also looking for the equivalent to yellows.

Here is a link to a chart showing their shore rating

http://www.ultitires.com/products/fo...th-foam-tires/

idbdoug

Hi guys, I'm new to 1/12 racing and I have a AE 12R5.2. Are there any good setups for asphalt and carpet that someone would be willing to share? Where I race there are not a lot of carpet tracks close by and there mainly is asphalt tracks.

I think I recognise your handle as an Australian one. I hope this helps.

Here's a set-up for an unprepared Boral Coat (painted concrete) surface, but it will work for asphalt (Riverstone, Sydney):

Front:
Ride height: 4.5 mm (no lower than 4 mm)
Springs: 0.020" (standard)
King pin grease: 50K to 80K (not critical, these are gas car diff grease weights)
Caster: ~3.5 degrees (standard)
Servo: run on an angle if you can, so that the steering links mount lower at the servo than at the steering knuckle (see previous posts)
Toe: slight toe-out.
Camber: 1 degree to 1.5 degree.

Rear:
Battery Position: run it across the chassis as far backward as possible.
Side-springs: blue (standard) (I'm thinking about going softer)
I'm not sure on side-tube fluid, I guess 20k or so (I'm running a converted 5.1 with a Side shock oil: 30 to 35 wt).
Centre shock oil: 25 wt.
Centre shock spring: silver (softer than standard for the small bumps).
Ride-height: 4.5 mm (no lower than 4 mm)
Droop: 1 mm lower at the rear of the pod than the chassis, with the wheels unloaded.
Chassis sag: None (i.e. chassis is level with the pod when the car is ready to run)

Other:
Motor: 10.5 blinky (Reedy Sonic)
Roll-out: 65 to 70 mm.
Body: something that's not to aggressive, e.g. Blackart Audi R8 would be good.
Roll-over antenna: run one, even if you have no antenna! (saves lots of time in accidents)
Weight balance: left to right balanced.
Most important: DO NOT trust the kit bumper. It is completely useless. Make your own bumper with foam, or look for some RC12L3 or XRAY corner chassis protectors.

Thanks mate, yeah I'm an Aussie. :p

What I forgot to mention is tyres. I'm using Ulti Hard front, and Ulti Soft rear. Speedmind 30R and 32F works well too and lasts a bit longer.

Hello all,

Been around 1/12 for a little while. I'm going to get a new kit. I am on the fence between the Serpent S120 LTX and the Xray X12'14. :confused:

I have ran the Associated and the older X12 (now my kids race them).

Looking for any feedback out there. Thanks

I have the Serpent S120 LTX and really like it

I'm currently running the S120LTX 17.5 blinky and find it difficult to find small enough spur since the motor plate has very little room for adjustment. While I really like the car, be prepared to figure out the gearing option if you will be running 17.5 blinky or others that require 100+mm rollout.

Anyone know where I can find 70T or 71T 64P pan car spur gears? PRS makes a 71T but I can't find it available anywhere.

Probably a dumb question. Any idea what size diff balls the rw spur gears take? I assume it's 1/8.