ok people think this is hard but hey, these things are calibrated to 200-300kmh for some stupid reason.

first off buy the gauge. first one i got was $30 on sale a cat eye one that was back lit. nice at night. been through a few on my 3 datsuns over the years but take 8 years to get one in this car. $6 at k mart.... scanned up at $2 go figure!

any way cut the wires for more length and select a spot in the cabin youd like to mount it so you can see it.
cut wires to splice in so that they reach gauge and the sender. i just twist tied these and heat shrink wrapped over the top. works a treat on this thin gauge stuff.




next measure distance between the strut and the rim edge. attach the sender to the strut with the self adhesive tape. i always cable tie them too.




attach magnet to the wheel rim. i locate mine next to the wheel weight for balancing reasons. i never got wobbles from them ever. i but a dab of silicon or superglue to attach it to the rim, then cover it with silicon to hold it on.

i only ever lost one magnet cause i didnt do the next step, cover the wheel weight and the magnet with a bead of smearedon silicon. dont go too thick as it can affect the sender reading the magnet.




heres how it looks installed. back light ones are good for night. dont get wireless as the car electrics tend to affect the signal readings.

you need to measure the circumerence of your tyre and enter it into the bike computer. but these things are really accurate. i love them. this one even reads temperature!!!!

Ya tinny bastard, what an ingenious idea! #OOPS#e loads cheaper than a GPS too!

Lol I did this over 10 years ago in my Ute originally. Works great.

Do you mean smear some sikkaflex on the magnet?

sikaflex or silicon that dries. Not one that stays flexible

Or you could download a gps speedo app for your smartphone

I did this as well a very long time ago, plus you can change the rolling diameter to suit your setup and they work really well as I've checked it with a few GPS units and spot on :) lasts ages

Nek Minnut
"Micks Speedo Installations" "For on $29.95" hahahahaah
This is an excellent way to do it though, no time at all to get it going cheap as buggery and even better if you're a broke student or apprentice like me! hahaha

unfamilia nice work, I had been trying this for some time using the tailshaft (instead of the wheel), but I am going to change mine to use your method!
:)

Evilsm if you had one of those dual Speedo ones that have cadence as well, the second sender could measure your tail shaft revolutions as well, giving you rpm. But id rather not upset balance of the tail shaft.