Stock:
09 Traverse LTZ AWD
20" OEM wheels
255/55R20 107H Bridgestone Dueler H/L Alenza M+S
Sidewall: 5.5in
Radius: 15.5in
Diameter: 31.0in
Circumf: 97.5in
Revs/mi: 650.0
Here's what I've gone with;
TPMS sensors from GM Dealership - $47 each
17" steel rims from the LS model - $95 each
245/70R17 110Q General Altimax Arctic - $194 each
Note: I went with the P model, versus the LT model. P model has 12/32 tread, LT has 16/32 tread. P is passenger, LT is light truck. LT had harsher ride.
Sidewall: 6.8in (a lot of rubber)
Radius: 15.3in
Diameter: 30.5in
Circumf: 95.8in
Revs/mi: 661.0
Effects;
1) Slightly narrower tire
2) Speedo reading with non-stock tire is 1.7% too fast. When your speedo reads 60mph, you are actually travelling 59.0mph
3) Steel rim is REALLY close to the brake calipers
4) Q-rated winter (99mph / 160km/h) versus H-rated stock (130mph / 210km/h) - both of which are higher than any "norm" highway speed in Ontario.
5) Higher load index on the winters
Why:
1) Live north of Toronto & travel to Muskoka in the winter
2) Keeps the "soft" stock 20"s for summer, so that they last longer
3) I consider winter tires part of insurance cost - I can pay for winter tires, or I can pay a tow truck if I get stuck, or I can pay for repairs instead of claiming through insurance if I slide off the road (and "pay" to take the time off work as well).
4) And most importantly - save the 20" wheels from the salt