ramrod This is why your speedmeter reads too low
I pulled out the needle off from the speedometer while I was replacing the clog wheel. When I placed back the needle on the pin. I had to readjust the needle to a correct point.
First attempt- The speed was 3 Km/h above
Second attempt- The speed was 2 Km/h below
Third attempt- I wasn't satisfied with the final adjust so I readjusted the needle again.
Forth attempt- The speed was 5Km/h above
Fifth attempt- The speed matches my GPS.
Nothing wrong about my tyres and they're pressured 34 PSi.