THIS INFO MAY HELP TIRE BUYERS

[BLUEKNIGHT911]

There has been quite a bit of chatter about REAR TIRES lately so this may be of interest on the sizing questions , I will list the following revolutions per mile for the following size tires commonly used for the rear tire on all Spyders...#1. 225/50 -15 = 869 revs per mile of rotation. #2. 215/60 -15 = 827 " " " " rotation #3. 205/60 -15 = 843 " " " " As you can see I'm not very talanted with using the computer, but the above figures are accurate......As you see the actual / real size of the three tires are extremely close even tho the listed sizes may let you believe otherwise............This info was gathered from " TIRE RACK " INC. and I thank them for it ....Mike

 

[Chupaca]

Gotta say..!!

if I'm speeding that mile difference will matter none to the guy issuing me a ticket...:roflblack:
Good info should help a lot of folks..

 

[Bob Denman]

How how would a 215/55-15 match up??
Or don't them build them like that?

 

[grumpybob]

How does that affect the ABS? I believe it does on a truck/car. I think it will pulse the brakes and wear the pads out quicker????

 

[SethO]

I have ran 215/60/r15 for my winter tires and you will run higher, on a stock tire size 118 mph on the speedo is really 112mph according to a radar gun and with the winter tire size it is worse about 122ish for 112.

they do work and do not effect the abs or fault the nanny.

https://www.tirerack.com/tires/tire...l&tireModel=Altimax+Arctic&partnum=16QR5AMAXA

the best snow tire I have found, especially studded.

 

[BLUEKNIGHT911]

YOUR BEAUTIFUL RENDITION

225/50 -15 = 869
215/60 -15 = 827 .95
205/60 -15 = 843 .97


If the Spyder speed is taken from the rear wheel (and I think it is) Then at 60 MPH the indicated speeds would be:

215/60 = 63 MPH
205/60 = 62 MPH

at least I think that's right.
I'm getting a head ache.

Thanks Roger, Mine did look somewhat like yours untill I hit the send key ...:yikes:
...:thumbup:
.....Mike

 

[BLUEKNIGHT911]

THAT SIZE TIRE

How how would a 215/55-15 match up??
Or don't them build them like that?

Bob, I only found one tire in that size and it was a Hoosier Racing tire ......Mike

 

[BLUEKNIGHT911]

ABS

How does that affect the ABS? I believe it does on a truck/car. I think it will pulse the brakes and wear the pads out quicker????

So far no one using any of these sizes ( and there are many people using them ) have reported any ABS or other " NANNY " related issues.......I have the OEM size in a Kumho and the 205/60-15 and NO PROBLEMS..........Mike

 

[BLUEKNIGHT911]

TIRE SIZE CHANGE = GEAR RATIO CHANGE

I have ran 215/60/r15 for my winter tires and you will run higher, on a stock tire size 118 mph on the speedo is really 112mph according to a radar gun and with the winter tire size it is worse about 122ish for 112.

they do work and do not effect the abs or fault the nanny.

https://www.tirerack.com/tires/tire...l&tireModel=Altimax+Arctic&partnum=16QR5AMAXA

the best snow tire I have found, especially studded.

Yo Seth, When you mount a larger circumference tire ...effectively you are gearing UP ie. going from a set of 4:10's ...to say 3:55's rear end gears.....It will increase your top end. AnnnnnnnnD.... IF you have the PONIES to pull it...:shemademe_smilie:....:2excited:....:roflblack:..:roflblack:...:roflblack:....And we are going to send you some incredible pictures that will totally blow your MIND....:agree:...:clap:...:yes::yes::yes:

 

[ulflyer]

Tire Calculator

225/50 -15 = 869
215/60 -15 = 827 .95
205/60 -15 = 843 .97


If the Spyder speed is taken from the rear wheel (and I think it is) Then at 60 MPH the indicated speeds would be:

215/60 = 63 MPH
205/60 = 62 MPH

at least I think that's right.
I'm getting a head ache.

I've used two of the 205 sizes; first was General Altimax and GPS put it at 1 mile over indicated at speeds from 40MPH up to 70. Second tire is a Pirilli? and it flicks from 1-2 miles over indicated so I call it a 1 1/2 over.

Heres an easy calculator

http://www.tacomaworld.com/forum/tirecalc.php