[d3naldi]

i confused to set a speedo recalibration
i need advice what number i must set ?

rear tires is 140/70-12
front gear 13
rear gear 30

and how can i using iphone to tracking speed?
what apps?

 

[stlswagger]

Not sure about any of the above but gps which you can use pretty much any gps/speed app that's free in the App Store

 

[TJDz125chik]

i just came across HealTech Speedo Healer. Havent't tried it yet but i'm thinking about getting it since i've done similar tire and sprocket changes.