This question gets asked here and elsewhere on the internet so much that I thought I’d have a permanent reference to it.
In *MOST* Cases the answer is going to be NO, you are NOT too heavy, allow me to ex plane my path.
At over 35 stone or 490 Pounds Or 223Kg’s I rode this.
It was TOTALLY standard, I would however suggest slick tyres for riding on road and TOTAL avoidance of Potholes and jumping off kerbs at that weight, I broke one spoke on the back wheel in about 1000 miles, due to smashing into a pothole (it was that or a bus)
At approx 28 stone, 390 Pounds or 177 KG, I moved onto 700′c wheels and a Hybrid.
Again I was painfully anal not to hit pot holes etc, never suffered ANY issues at all and the bike was totally stock.
At approx 24 stone, 330 pounds or 150Kg, I moved onto a road bike, WITH STANDARD WHEELS.
While he back wheel did suffer issues, this was after around 3000 miles of DAILY riding in ALL conditions.
So there you have a ROUGH Guide as to weather or not you are too heavy for the bike you desire to help you lose weight on…..Good Luck !!!
Sky Ride , a campaign to get one million more people onto their bikes by 2013