Does tire size affect speedo?

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Does tire size affect speedo?

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Does tire size affect speedo? - 5/15/2008 8:00:50 PM

ballintbones50

Posts: 1
Joined: 5/15/2008
Status: offline

I went from a 160/60ZR17 to a 180/55ZR17.

Does anyone know if the change in tire size would affect the speedometer?

It feels like I'm going 60mph when the speedometer is telling me 70mph.

Maybe its just me but if anyone has any info, that would be sweet.

Thanks

Post #: 1

RE: Does tire size affect speedo? - 5/15/2008 8:04:57 PM

PlayfulGod

Posts: 2453
Joined: 6/9/2007
From: Dalton, GA
Status: online

yes n the bike wont turn in as easy anymore or make it handle even worse if the tire is on a wheel not meant for a 180 as it will completely change the profile of the tire. And all that all depends on how you ride.

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RE: Does tire size affect speedo? - 5/15/2008 8:13:39 PM

jutsin

Posts: 497
Joined: 5/25/2006
Status: offline

Yes but your new tire size is only 3 millimeters bigger overall diameter than the old one.. It will actually be the other way around though, where the speedo will say you are going slower than you actually are

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RE: Does tire size affect speedo? - 5/15/2008 9:14:02 PM

kwong2001

Posts: 383
Joined: 6/5/2006
From: Federal Way, WA
Status: offline

3mm's is negligible. You'd get more inaccuracies from just riding the bike and wearing down the tire. It's all in your head, get a speedohealer if you feel the speedometer is off by more than what you're comfortable with.

(in reply to jutsin)

Post #: 4

RE: Does tire size affect speedo? - 5/16/2008 7:04:00 AM

njdjh2o

Posts: 148
Joined: 2/18/2008
Status: offline

I also have the 180 on my bike, I rode up on the new Honda Civics with that big digital dash and I saw the driver was doing 80 and so was I.

When I do 65 it feels like I am going much slower, I don't feel speed unless I doing over 80 mph. But, as for the misses who just started riding feel like 65 is going to fast.

Just like it was stated, it is all in the mind of the rider.

(in reply to kwong2001)

Post #: 5

RE: Does tire size affect speedo? - 5/16/2008 12:37:31 PM

rk97

Posts: 68
Joined: 5/13/2008
Status: offline

doesn't the speedo go off the front wheel??

your RPM would change based on the size of the rear tire, but not the speedometer, no?

+1 to the wider rear causing slower turn-in. the track riders I have talked to prefer a 160/60 (this is on the 5" rim though)

(in reply to njdjh2o)

Post #: 6

RE: Does tire size affect speedo? - 5/16/2008 3:06:01 PM

Mooseknuckle

Posts: 101
Joined: 4/25/2008
Status: offline

You're thinking F2. The F3's speedos go off the trans.

(in reply to rk97)

Post #: 7

RE: Does tire size affect speedo? - 5/16/2008 6:27:15 PM

shoemjay

Posts: 151
Joined: 10/13/2007
Status: offline

i got a 170/60 on rear and im short, so could i get a 170/50 or less to lower it a little w/o sacrificing handling. does anyone know where the post is that explains the effects of a bigger or smaller tire, or maybe let me know the deal.

(in reply to Mooseknuckle)

Post #: 8