Bridgestone Dueler H/T (D684)
26/Oct/2001
P205/70R15
(Original Equipment Tyres)Bridgestone Dueler A/T (D693)
30/Jul/2002
P205/70R15
This is where my foray into off-roading modifications began. After
learning the benefits of All-Terrain tyres, I was keen to equip my
Forester with the necessary rubber.
As you can see in this photo, this is no minor change - I'm going
serious off-road!
Before / After
Kumho RoadVenture A/T 825
31/May/2003
P225/70R15
This larger tyre increases the
rolling radius
by approximately 14mm - which effectively lifts the entire vehicle
14mm higher off the ground.
Combined with my bodylift, the Forester
is now quite a bit higher than stock (264mm in theory).
| Specification | Radius | Diameter | Difference |
|---|---|---|---|
| 205/70/R15 | 334mm | 668mm | 0.0% |
| 225/70/R15 | 348mm | 696mm | 4.2% |
Interestingly, this particular brand of tyre has a fairly narrow tread-width
- I measured about only 3mm wider than the Dueler 205/70/R15's (above). This is despite
the overall width being 20mm wider (including sidewall slopes and bulge).
As a design decision, I'm assuming that
the narrower footprint applies greater pressure to the road surface
because the weight of the vehicle is spread over a smaller area
and therefore digs better than wider footprints (treads).
Before / After
Cooper Discoverer ATR
15/Sep/2005
P205/75R15
