• Ciao Guest - You’ve landed at the ultimate Guzzi site. NEW FORUM REGISTRATIONS REQUIRE EMAIL ACTIVATION - CHECK YOUR SPAM FOLDER - Use the CONTACT above if you need help. New to the forum? For all new members, we require ONE post in the Introductions section at the bottom, in order to post in most of the other sections. ALWAYS TRY A SEARCH BEFORE STARTING A NEW TOPIC - Most questions you may have, have likely been already answered. DON'T BE A DRIVE-BY POSTER: As a common courtesy, check back in and reply within 24 hours, or your post will be deleted. Note there's decades of heavily experienced Guzzi professionals on this site, all whom happily give endless amounts of their VALUABLE time for free; BE COURTEOUS AND RESPECTFUL!
  • Be sure to see the GTM STORE link also above for our 700+ product inventory, including OEM parts and many of our 100% Made-in-SoCal-USA GTM products and engine kits. In SoCal? Click the SERVICE tab above for the best in service, tires, tuning and installation of our products or custom work, and don't miss our GT MotoCycles® (not) art on the BUILDS tab above. WE'RE HERE ONLINE ONLY - NO PHONE CALLS MADE OR RECEIVED - DO NOT EMAIL AND ASK QUESTIONS OR ASK TO CALL YOU.
  • There is ZERO tolerance on personal attacks and ANY HYPERLINKS to PRODUCT(S) or other competing website(s), including personal pages, social media or other Forums. This ALSO INCLUDES ECU DIAGnostic software, questions and mapping. We work very hard to offer commercially supported products and to keep info relevant here. First offense is a note, second is a warning, third time will get you banned from the site. We don't have the time to chase repeat (and ignorant) offenders. This is NOT a social media platform; It's an ad-free, privately funded website, in small help with user donations. Be sure to see the GTM STORE link above; ALL product purchases help support the site, or you can upgrade your Forum profile or DONATE via the link above.

V85TT Speedo error - tire size help

Biggus Dickus

Biggus Dickus

Just got it firing!
Joined
Sep 24, 2021
Messages
23
Location
NSW, AUstralia
GTM® said:
In the owners manual, read up and try a tire size correction. It’s the only way you’ll get close to correcting it. It’s NOT an ECU issue. The ECUs only job is to manage the engine.
Click to expand...
THANKS for the info re correcting the speedo via going up in tyre diameter !!!
( I have done exactly this - to remedy the speedo error in my Isuzu utility truck )

The standard rear tyre on my V85TT is 150/70 R17 - which has an outside diameter ( the pumped up, rolling diameter ) of around 64cms

My next obvious questions, are : Is there a "popular choice" that people have for the V85TT to :
1) Increase the rolling / outside diameter of the rear tyre ? .............
2) Do I have to increase the diameter of the FRONT tyre as well ( re issues with the ABS "counting" revolutions of both wheels ?!??!? ) - ( I thought that the ABS would be comparing the number of turns of the rear wheel - as compared to the front ......... Yes / No ? )

I'm happy with the ANAKEE ADVENTURE tyre on tar - but, it's nowhere as good on dirt - and CRAP in mud / wet offroad stuff :( ...... I'd LIKE to go more a 50/50 tyre .... which is what an ANAKEE WILD is supposed to be ....... I now know that the rolling / outside diameter of the ANAKEE ADVENTURE tyre is around 64cms in diameter - therefore I would need to find a tyre that has an outside, rolling diameter that's around 70cms ( in order to fix the speedo error ) .... so ....

3) Does anybody KNOW what the outside rilling diameter of an ANAKEE WILD tyre IS ?!?

( NOTE : I suspect that the tyre that is going to correct this speedo error would have to be a different configuration thought - IE : perhaps a 150/90 .... or a 170/70 - in order to get a TALLER wall on the tyre )

ANY advice would be VERY much appreciated !!!

Cheer for now
Biggus ( Rick ) ... in Oz

PS : Just had an after thought ....
The OTHER obvious "fix" ( re speedo error ) would be to remake the two Hall-Effect ABS sensor discs on each wheel hub .... so that they had 10% MORE SLOTS in them ...... Has ANYBODY had a go at doing this ?!?!?!?!?
 
Biggus Dickus said:
THANKS for the info re correcting the speedo via going up in tyre diameter !!!
( I have done exactly this - to remedy the speedo error in my Isuzu utility truck )

The standard rear tyre on my V85TT is 150/70 R17 - which has an outside diameter ( the pumped up, rolling diameter ) of around 64cms

My next obvious questions, are : Is there a "popular choice" that people have for the V85TT to :
1) Increase the rolling / outside diameter of the rear tyre ? .............
2) Do I have to increase the diameter of the FRONT tyre as well ( re issues with the ABS "counting" revolutions of both wheels ?!??!? ) - ( I thought that the ABS would be comparing the number of turns of the rear wheel - as compared to the front ......... Yes / No ? )

I'm happy with the ANAKEE ADVENTURE tyre on tar - but, it's nowhere as good on dirt - and CRAP in mud / wet offroad stuff :( ...... I'd LIKE to go more a 50/50 tyre .... which is what an ANAKEE WILD is supposed to be ....... I now know that the rolling / outside diameter of the ANAKEE ADVENTURE tyre is around 64cms in diameter - therefore I would need to find a tyre that has an outside, rolling diameter that's around 70cms ( in order to fix the speedo error ) .... so ....

3) Does anybody KNOW what the outside rilling diameter of an ANAKEE WILD tyre IS ?!?

( NOTE : I suspect that the tyre that is going to correct this speedo error would have to be a different configuration thought - IE : perhaps a 150/90 .... or a 170/70 - in order to get a TALLER wall on the tyre )

ANY advice would be VERY much appreciated !!!

Cheer for now
Biggus ( Rick ) ... in Oz

PS : Just had an after thought ....
The OTHER obvious "fix" ( re speedo error ) would be to remake the two Hall-Effect ABS sensor discs on each wheel hub .... so that they had 10% MORE SLOTS in them ...... Has ANYBODY had a go at doing this ?!?!?!?!?
Click to expand...
Shouldn’t that be 10% fewer slots?
 
You must log in or register to reply here.
Back
Top