DKMOTORK 0011 Digital Gauge... https://www.amazon.com/dp/B07WW3L3Y8?ref=ppx_pop_mob_ap_share

Problem is most speedometers are either cable driven or electronic.

The cable ones are difficult to use because u have to modify the front rim and axle to accept the gear. The fab a mount that will line up with the gear then calibrate it. Only to have a rock bounce up and hit the houseing and snap the end of the cable right off. I was so pissed. Did it in the first 15 min after 3days of welding fabbing shit just to.make it work.

So I put a charging flywheel and coils on and mounted a 12v 7ah battery from a battery backup on. Bought a digital speedo from amazon that works with magnets. Tells u rpm distance amd some more stuff. Much easier to install. Only had to weld on a coulpe of tabs to hold the sensor wire less than 1" from the magnets on the rim. Works great and looks cool to but has to be powered by 12v.12v speedo