Metzler 170/80/15 question

[TheTwistedNomad]

I am in need of new tires and I was looking at the metzlers. My question is, by changing from the OEM of 150-90-15 to the 170-80-15 will my speedometer be affected and if so by how much? Also, if there is a change can you adjust the speedometer some how to compensate for the change in reading? Thanks,

Will

 

[Traumahawk]

Unless your speedo drive is not at the front tire, then no. Changing the rear tire will not affect how the speedometer reads.

I changed from the stock dunlop to a Shinko 170/80-15 with no speedometer issues at all.

 

[naughtyG]

+1 speedo's on the front wheel so will only be affected if you change the front tire size.

Rear 170/80 is very close in diameter size to the 150/90, so you'll hardly notice any RPM change.

 

[VmaxMann]

This should help:
150/90-15 170/80-15 Difference Diameter inches (mm) 25.63 (651) 25.71 (653) 0.08 (2) 0.3% Width inches (mm) 5.91 (150) 6.69 (170) 0.79 (20) 13.3% Circum. inches (mm) 80.52 (2045.18) 80.77 (2051.46) 0.25 (6.28) 0.3% Sidewall Height inches (mm) 5.31 (135) 5.35 (136) 0.04 (1) 0.7% Revolutions per mile (km) 786.9 (488.95) 784.49 (487.46) -2.41 (-1.5) -0.3%

 

[VmaxMann]

Her are the specs for speedo differences:
Speedometer Difference

Speedo Reading Actual Speed 20 mph (32.19 km/h)20.06 mph (32.29 km/h)25 mph (40.23 km/h)25.08 mph (40.36 km/h)30 mph (48.28 km/h)30.09 mph (48.43 km/h)35 mph (56.33 km/h)35.11 mph (56.5 km/h)40 mph (64.37 km/h)40.12 mph (64.57 km/h)45 mph (72.42 km/h)45.14 mph (72.64 km/h)50 mph (80.47 km/h)50.15 mph (80.71 km/h)55 mph (88.51 km/h)55.17 mph (88.79 km/h)60 mph (96.56 km/h)60.18 mph (96.86 km/h)65 mph (104.61 km/h)65.2 mph (104.93 km/h)

 

[tugla]

u will have no issues with that tire....looks tough on the bike.....enjoy