Unfortunately, I know ALL too well of this issue. Read my thread below titled "Doctor recommendation". I am in the same boat as you, only I do ride a road bike (in my 4th year of serious cycling). I've tried practically every glove on the market...from heavily padded, to lightly padded, to no padding. None of them make a bit of difference for me. My hands still go numb and tingly within the first 30 minutes of a ride, and stay that way for the entire duration of the ride. I've had 4 professional bike fittings, one being the renowned "Retul" fit. I currently ride a custom fitted Ti bike, in which my fitting took nearly 3 hours and included video taping of my riding position, and many adjustments done by the fitter (thought to be the BEST fitter in the Chicagoland area). I am still in agony on every ride. ):
I wish I had some advice for you, but in my case...I'm at the point where I am ready to seek medical advice from a doctor. I'm beginning to think that I may have a compressed/pinched nerve somewhere along the nerve pathway into my hands.
Good luck and I hope you find some relief for your hand issue soon!
Linda
2012 Seven Axiom SL - Specialized Ruby SL 155