newgtowner

i think i will leave the standard rims and tyres on it lol

 

Territory

Hi,

I'm a newcomer to these forums.

Territory DSC has been tuned for its specific engine/transmission/tyre combination. It works unobtrusively and cuts in quite early with a visual warning via the dash light (no beeping alarm or 'snapping back straight' to let your passengers know you 'lost it' on that last bend!). The system is the latest available globally and is specifically for retaining/regaining steering control in situations of understeer or oversteer (within limits!). Basically it helps the vehicle go where you are steering towards. It helps stop you spinning out or sliding off the road when cornering, swerving, driving on slippery surfaces like ice, mud or gravel. Very different from Traction or ABS.

In relation to your larger wheels question, you should really keep the standard wheels & tyres on AWD to get maximum benefit from DSC.

Hope that helps.

Curls

Welcome and thanks for the info...sounds like you're in the know...

Territory

I'm happy to help resolve forum questions in my personal time, but I can only drop in to check every few days.

johnydep

I think it all depends on keeping the same rolling diamater (circumferance).

If you go up size with the rims, you must have lower profile tyres. For example; if the total size of the original tyre/rim is 26 inch high. The replacement bigger rim must have a smaller tyre side wall (low profile) that equals 26 inch.

That way the speedo reading stays the same & the speed signal to the computer is the same, that way there will be no problems with all the safety features & engine/trans management.

Thats my 2 cents worth, hope it helps.

outback_ute

Yes but the different tyre profile may upset the DSC by responding in a different way to what it has been programmed with. The original poster was talking about a plus-1 fitment, so if we are looking at going from 235/60/17 to 235/55/18 (dia only 0.3% out) I don't think it would upset the apple cart. Tyre sidewall height goes from 140 to 130mm in round figures.

PS. the tyre dia for the Territory is 28.1"/714mm

johnydep

As far as I know, the DSC only works when it detects excess steering angle to vehicle motion; which indicates an under-steer or over-steer situation. And a few other things like wheel spin & brake lock-up through sensors on all four axle shafts, a angle sensor on the steering shaft, engine & vehicle speed sensors, gear selection, brake & accelerator pressure.

If the overall height of the tyre is not changed, the sensors for the DSC should still do the job. The tyre change may only cause the DSC to work more or less, depending on traction, overall height of vehicle will be the same.
Changing the height, as in lowering the vehicle, to make the taller rims look better will probably effect the DSC more than changing to bigger rims but keeping the original 28.1"/714mm dia.

In the end having a rim size of 19 inch and a good quality low profile tyre, that still keeps the original Territory size of 28.1"/714mm may only cause a harsher ride.
Unless traction is adversely affected the DSC should never operate in normal conditions.

I suppose there is only one way to find out – someone has to try out the theory.
Any volunteers?

RAPTOR

It all depend on how sensitive it is and how finely tuned it is. The media has made out that it is very well tuned and unobtrusive by acting early and quickly so not requiring major adjustments by letting things really start to get out of shape.

johnydep you need to remember that the steering angle can be a lot different for the same vehicle path when your fitted with say 40% profile high-performance 19 inch treads rather than factory 60% profile AWD rubber. It's got to do with the slip angle of the tyre and distortion or twist that occurs in the sidewall. The overall diameter (height) is only one aspect.

But as you say until someone starts playing around only the boffins at Bosch and Ford really know whats likely to happen and as far as I know none of them are saying on here. Guys were are you when we need you?

__________________

Territory

For what it's worth:
- Yes wheel studs are different from BA
- Road biased on RWD and Offroad biased on AWD but same tyre dimensions
- Yes it is a 60 profile which is harder to find but handles better.
- Changes in the rolling diameter will impact DSC performance
- Elevating the vehicle will impact DSC, not sure but lowering might have less impact.
- Things that DSC considers: Yaw sensor (rotation around central vertical axis), steering wheel angle, wheel rotation speeds, vehicle speed, engine, transmission, tyre diameter, tyre grip levels, brake grip level, etc etc. It is very complex but basically with all these variables it must have some flex.

Additional things to consider before upsizing your wheels/tyres
- Check clearance issues if you plan to try and fit 18+" and/or higher profile tyres (suspension travel and wheel/tyre width)
- Have you considered whether your super-sized spare will fit...?!

bossxr8

I saw a black Territory at work with the XR 18 inch wheels fitted, and the tyres were not the Dunlop SP9000's, but I couldn't get close enough to see what kind of tyres were fitted as it was behind a chain link fence.