Worth Upgrading from 19s to 20s? Ride Comfort Feedback Wanted

[kinelisch]

I hear what you are saying... I guess I need to put the 305's on the front and then go get some 315's for the rear. I like the way you think!

Yessssss

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[Ken H.]

2024 DH HP. Went from stock 19’s with Pirelli Trofeo RS 305/35R19 & 315/35R19’s to 20’s with Michelin PS AS 4
285/35R20 front
305/35R20 rear
(Wider tread width than stock tires).
HOWEVER,
1. Front tires taller than stock & caused my cruise control to stop working. Ford dealer & engineers determined that the change in height interfered with the camera reading the road & providing input to the computer. Put stocks back on for the summer & problem resolved. Just changed to 285/30R20 A/S fronts this week. Waiting to see if problem recurs. 305 rears still taller - hope the angle doesn’t affect the camera. If it does, I plan to get 295’s for the rear for comparable diameter.
2. Rear tires taller than stock. Speedometer reads slower than actual speed. Have to refer to GPS speed on radar detector for towns & speed traps. Annoying. Considering getting forscan (sp) adjustment but may go back to stock summer only setup for warm weather. Michelin has a 295 A/S (? 30 or 35) that is similar diameter to stock tire

 

[Ken H.]

2024 DH HP. Went from stock 19’s with Pirelli Trofeo RS 305/35R19 & 315/35R19’s to 20’s with Michelin PS AS 4
285/35R20 front
305/35R20 rear
(Wider tread width than stock tires).
HOWEVER,
1. Front tires taller than stock & caused my cruise control to stop working. Ford dealer & engineers determined that the change in height interfered with the camera reading the road & providing input to the computer. Put stocks back on for the summer & problem resolved. Just changed to 285/30R20 A/S fronts this week. Waiting to see if problem recurs. 305 rears still taller - hope the angle doesn’t affect the camera. If it does, I plan to get 295’s for the rear for comparable diameter.
2. Rear tires taller than stock. Speedometer reads slower than actual speed. Have to refer to GPS speed on radar detector for towns & speed traps. Annoying. Considering getting forscan (sp) adjustment but may go back to stock summer only setup for warm weather. Michelin has a 295 A/S (? 30 or 35) that is similar diameter to stock tire

Left out - don’t notice big difference in ride quality.

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