Tire circumference By icebear2009 (Read 1,412 times)

[icebear2009]

OK I installed a universal LCD speedometer on my trike and the setting it wants for tire size is 3 digits and I was told it wants it in mm size how do I figure this out ?

Right now it only reads up to 16 MPH when I'm riding and I know I'm going along faster then that

I have it set right now as 130 in settings because that was biggest number on tire but I'm wrong it says it wants circumference in mm the range goes from 50-9999

[Alleyoop]

Best to get the right circumference is put a chalk mark on the tire and floor then roll it have the tir mark hit the floor and mark it there. Then measure the distance from mark to mark and convert the inchs to MM.

What size are you tires 130x??x??
Alleyoop

[icebear2009]

I have to go look but wanna say 130x3.50x13 unless that is rim size ....

[Alleyoop]

Nope get the size off the tire, it will say 130x60x13 or something like that.

[icebear2009]

Yes sir just looked it 130x60x13

[Alleyoop]

Ok the circumference is 1527mm

[icebear2009]

OK that will help to accurate my speedo right ?

[icebear2009]

Actually wait it only has room for 3 digits when it wants tire size

[icebear2009]

www.ebay.com/itm/like/222028329637?lpid=82&chn=ps&ul_ref=http%253A%252F%252Frover.ebay.com%252Frover%252F1%252F711-117182-37290-0%252F2%253Fmtid%253D1588%2526kwid%253D1%2526crlp%253D53601919689_324272%2526itemid%253D222028329637%2526targetid%253D173529644649%2526rpc%253D0.17%2526rpc_upld_id%253D69872%2526device%253Dm%2526mpre%253Dhttp%25253A%25252F%25252Fwww.ebay.com%25252Fulk%25252Fitm%25252Flike%25252F222028329637%25253Flpid%25253D82%252526chn%25253Dps%2526adtype%253Dpla%2526googleloc%253D200514%2526poi%253D%2526campaignid%253D239125209%2526adgroupid%253D14978428809%2526rlsatarget%253Dpla-173529644649%2526gclid%253DCJWCtrOry8wCFZM6gQodk9QEYw%2526srcrot%253D711-117182-37290-0%2526rvr_id%253D1027053264745&ul_noapp=true


This is what I bought

[icebear2009]

m.banggood.com/12000RMP-Motorcycle-LCD-Digital-Odometer-Speedometer-Tachometer-F1-2-4-Cylinders-p-987881.html


This page tells me how yo set it ....scroll down a little bit on it

[Alleyoop]

Here it calcs the tires size: It shows Circumference is 60.136
www.csgnetwork.com/tiresizescalc.html

[icebear2009]

Yeah I see that I guess I'm just lost if directions say between 50-999 mm the mm we need is 1527 but inches is 60.136 .....guess ill have to try inches and see what happens .....unless u know of a better LCD speedometer I could put on it

[Alleyoop]

Ok try 482mm tire diameter of 19.

[icebear2009]

OK ill give it a try tomorrow when I get home from work at like 9am right now I have it set at 130 and when I was riding yesterday I was cruising along at what felt like 40 throttle wide open flat road speedometer said 17mph

[Alleyoop]

Well setting it from 130 to 452 should give a higher number, we may have found what it needs to be set at. Those chinese instructions are not very clear of what to use really as all of their instructions for anything else for that matter