I would like to get back into cycling again, however over the last couple of years I have piled a few needless pounds on. I currently weight 178kg (392 lbs), would a standard bike frame withstand my weight? I'm hoping to loose substantial weight hopefully by cycling each day as I've never been much of a runner. But do I need to loose this weight before I start cycling. I had been looking at the Carrera Vengeance Mens Mountain Bike 2015 - 22".
178kg would put significant strain on most off the shelf bicycles. Most critical parts would be wheels, bottom bracket, crank set, and suspension if any.
I would suggest that you go to your local bike shop and have custom assembled bicycle for you with:
- wheels 26" with at least 36 spokes, best quality double walled rims, best quality spokes and good wheel builder
- robust steel frame with no suspension
- wide tires
- bottom bracket and crank set with external bearings like Hollowtech II, or better
Firstly I want to congratulate you on your resolve.
Yours is twice the weight (90 kg x 2) of a normal heavy rider. I see that bike you mentioned is a very cheap bike. For your safety DON'T!!!!.
I can recommend that you do a LOT of searching online about bikes for heavy people, find examples that have worked for people at or above your specific size and weight.
Here is one very interesting blog by someone who lost weight and "reclaimed" health through bicycle riding: http://reclaimingjames.blogspot.com/2013/04/bicycle-recommendation-for-very.html
He recommends a 29er with fat slick tires for road use. It sounds good. You will notice he mentions $5000 to $6000 dollars as a price tag but I think it doesn't need to be that much.
"Surley" (http://surlybikes.com/) is a US company that makes sturdy steel bikes at a reasonable price. (I am planning to get a Surley for my next bike). They have contact information on their web page.
I hope they are as friendly as their website looks, and they would give you the info about what bike would suit your needs. Then you could go to a LBS which is a Surely dealer to get the bike you want and have already confirmed would suit you, who could also help get the details right like the right kind of saddle. I guess you could do it with budget of $2000 US.
I'm 80 kg and I have a scar above my left eye that tells me that "cheapest" does not make sense when choosing a bike. Even more so for you.
Good luck dude!