ramifications of adding a spacer to dual wheels
Hi, I will have to add a spacer of 0.55 of an inch to boost the distance between my rear rims in order to move to 235/R85/16 tires. What might be the concerns of doing so?
Forum Discussion
Hi,
The first results and impressions:
speedometer error is 8% so at 80 kph reading I am going 85 kph
I found the biggest hill in the area and was able to maintain my usual cruising speed of 80 kph. The tranny downshifted twice. It did the same with the "stock" tires.
1800 rpm = 80 kph (according to gps device) on the OEM tires that was 76 kph.
scan gauge reads 46 mph @ 1800 rpm--confirming the 8% error
Initial trip was with a head wind/side wind. Mileage appears to be measurably improved--but that won't be known for sure until I have a few thousand kilometers "on the clock"
No difference in engine temperature with the larger wheels/tires
It did take about 30 minutes of driving for me to get "used to" the new configuration.
I was on a four lane highway and had no opportunity to see how trucks going the other direction might affect the ride.
At one point there was a gusting wind situation. No extra sway seemed to be evident.
Road noise is reduced--but there is a low pitched rumble that was not there before. It got better (or perhaps I became desensitized to it) as the trip progressed (Regina to Saskatoon, destination Pike Lake, SK)
There was fairly vicious thunderstorm at the Black Strap Valley. I would normally have dropped out of cruise--but decided to risk leaving it on. There was no issue of hydroplaning nor loss of stability.
Ride is somewhat smoother.
I can tell the difference in height--which surprised me a bit.
I hope to find a washboard road tomorrow.
I did "take it up" to 110 kph to pass a slightly slower moving vehicle. I found I was over correcting on the steering at the higher speed.
So far I'm pleased with the results.
I can hardly wait to confirm the increase in miles per gallon. I should know for sure by about July 6th.
The first results and impressions:
speedometer error is 8% so at 80 kph reading I am going 85 kph
I found the biggest hill in the area and was able to maintain my usual cruising speed of 80 kph. The tranny downshifted twice. It did the same with the "stock" tires.
1800 rpm = 80 kph (according to gps device) on the OEM tires that was 76 kph.
scan gauge reads 46 mph @ 1800 rpm--confirming the 8% error
Initial trip was with a head wind/side wind. Mileage appears to be measurably improved--but that won't be known for sure until I have a few thousand kilometers "on the clock"
No difference in engine temperature with the larger wheels/tires
It did take about 30 minutes of driving for me to get "used to" the new configuration.
I was on a four lane highway and had no opportunity to see how trucks going the other direction might affect the ride.
At one point there was a gusting wind situation. No extra sway seemed to be evident.
Road noise is reduced--but there is a low pitched rumble that was not there before. It got better (or perhaps I became desensitized to it) as the trip progressed (Regina to Saskatoon, destination Pike Lake, SK)
There was fairly vicious thunderstorm at the Black Strap Valley. I would normally have dropped out of cruise--but decided to risk leaving it on. There was no issue of hydroplaning nor loss of stability.
Ride is somewhat smoother.
I can tell the difference in height--which surprised me a bit.
I hope to find a washboard road tomorrow.
I did "take it up" to 110 kph to pass a slightly slower moving vehicle. I found I was over correcting on the steering at the higher speed.
So far I'm pleased with the results.
I can hardly wait to confirm the increase in miles per gallon. I should know for sure by about July 6th.
