cOoTeR Posted June 7, 2011 Report Share Posted June 7, 2011 I'm having a 190/55 tire installed on my 07 cbr 1000 stock it has a 190/50. I assume thus will throw my speedometer off. Does anyone know of it will read faster or slower, how much? Anything else I should be aware of? Quote Link to comment Share on other sites More sharing options...
Helmutt Posted June 7, 2011 Report Share Posted June 7, 2011 the speedo won't be affected by much, but it will read slower than your actual speed unless you've played with gearing......then it's a math project!! I've noticed with my bike is that factory 50's perform well, but that little extra profile helps turn in.......my bike would turn nicely on 50's, but felt even better on 55's Quote Link to comment Share on other sites More sharing options...
Bubba Posted June 7, 2011 Report Share Posted June 7, 2011 I assume that the tire specs for MCs are the same as for cars, so...190 is the width profile of the tire = 190 mm.50 or 55 is the percentage of sidewall height to width.Therefore, a 190/55 has approx 19 mm greater overall diameter (about 0.75") than a 190/50 tire. [190*0.50=95; 190*0.55=104.5; (104.5-95.0)*2=19 mm]You'd have to know the overall diameter of one of the combos to calculate an exact speedo correction, but I assume it's in the 2% or less range, i.e., at 70 MPH indicated, your actual speed would be approx 71.5 MPH. Not a big deal, since most of us do 10-20 over anyway... Quote Link to comment Share on other sites More sharing options...
MidgetTodd Posted June 7, 2011 Report Share Posted June 7, 2011 Thats what I run and like them better, your speedo is already off from the factory so it really makes no difference. Get a speedo healer and set it by gps Quote Link to comment Share on other sites More sharing options...
jagr Posted June 7, 2011 Report Share Posted June 7, 2011 Next you'll chrome your rims and put an extended swingarm on. Quote Link to comment Share on other sites More sharing options...
magley64 Posted June 7, 2011 Report Share Posted June 7, 2011 does the 1000 have the speedo off the trans like the XX?most bikes drive speedo off front wheel, don't they? Quote Link to comment Share on other sites More sharing options...
MidgetTodd Posted June 8, 2011 Report Share Posted June 8, 2011 its off the transmission Quote Link to comment Share on other sites More sharing options...
jporter12 Posted June 8, 2011 Report Share Posted June 8, 2011 does the 1000 have the speedo off the trans like the XX?most bikes drive speedo off front wheel, don't they?Most of the newer bikes have electronic speedometers "driven" (read by a sensor) off the transmission. Quote Link to comment Share on other sites More sharing options...
magley64 Posted June 8, 2011 Report Share Posted June 8, 2011 interesting... had no idea... Quote Link to comment Share on other sites More sharing options...
cOoTeR Posted June 8, 2011 Author Report Share Posted June 8, 2011 Next you'll chrome your rims and put an extended swingarm on. Nah next is the gold chain to go with my squid suit. Then pulling the front rotors off and taking out the right headlight. Quote Link to comment Share on other sites More sharing options...
Helmutt Posted June 10, 2011 Report Share Posted June 10, 2011 don't forget the chrome spiked bar ends and chrome spiked fork caps to guarantee impalement in a crash!!And nothing looks better with anodized valve stem caps than a chrome chain guard Quote Link to comment Share on other sites More sharing options...
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