If the chain is making contact with the tyre then that’s also true, but a secondary matter in comparison. Is it not making a noise?
Not that I've noticed. I don't think the contact is constant, I reckon that the tyre damage would be more if it were. If you look at the right of the photo you'll see that there is still a mould line on the outer edge. The pair of Road 5s have been on since before my Dolomites trip in May, probably 4k+ into their life. I haven't measured it but I reckon that they're a bit wider than the OEM Scorpions. I'm not running a chain oiler and don't over oil the chain. No significant, if any, lube finding it's way onto the tyre. Chain is tensioned as per manual using the gauge in the tool-kit.
I changed the gearing on two Ducatis (+2R and -1F on the other) including the 1260 Multi and the speedo did not show any changes relative to GPS. The awful tracking error hasn't gotten worse. I'm sure this has been discussed extensively somewhere on this forum. This may be cold comfort but I'm really irritated by the speedometer's inaccuracy right off-the showroom floor.
Interesting. I'm not saying the ABS ring isn't where the bike gets its speedo reading from cos' I really don't know, but your experience with gearing changes suggests it is. I suppose it would make sense.
One sure way to find out would be to un-plug the abs speed sensor cable. Not that i'm ready to do that although it would be great to have confirmation about this among other Ducati dark art stuff.
Just had a thought ... bike on centrestand, ignition on, engine not running, spin back wheel. Yes that registers on the Speedo. So I agree that's where it's getting it's speedo reading ... so, no, gearing changes wouldn't alter speed readings.
P.S. my speedo shows 62mph for GPS 60mph on new tyres. Yes I'd prefer it to be more accurate but I think that's common practice among vehicle makers?
Is t the speedo sensor on the rear wheel? Hence speedo is ok and not affected by gearing or tyre changes, but TC can be because a change in profile is picked up as a slightly different speed by the IMU. It’s why some bikes (like panigale?) need a recalibration if you throw a different rear tyre on
That is correct. The Multistrada 1260 has this feature in the menu section as well. I did a tire calibration once I changed the gearing. In fact, I toyed with it a lot to see if I could reduce the speedometer's tracking error. Not
All the calibration is doing is assisting understanding the new difference, because of a changed circumference, between front & rear wheels speeds.
