Yes, 2yo sounds WAY too early to me for raising the training wheels.
2yo is quite early for a 2-wheeler, I think, though that's not a judgement since your DS was clearly ready for it. I mean it only as an observation that your DS is ahead of the curve on this.
I'm with Dottie: the end of last summer (age 6 and a few months) was DS7's first year without training wheels. Until they're 5-7yo, kids usually don't have the balance and leg strength to manage without training wheels.
We have used a helmet and no pads with DS4 (who started riding a 2-wheeler at 3yo, at the end of last season), though the pads wouldn't be a bad idea. Either that or have a good supply of bandaids on hand. We have used our share!
