This is a hand built Nirve Scull Series bike with front & rear 3 inch tires. As of today I traded out for a 68.5 H2 Angle plug engine 3 speed interplanetary hub and Jack Shaft assembly (the only way to go in my book) when I had 42 tooth front sproket it reached 42mph. I changed to a 48t sproket for more power (Top speed 38.6mph)to climb the ridge I live on about 800 ft above sea level. Been riding it over a year to and from work and its a Gas!!
