Looks like a super hypo carrot tail. Not a baldy as it has head spots. If it's a nice deep orange then it's a tangerine I know how hard it is to get that to show up in pics.
I don't think that's a carrot tail, as the tail doesn't look like it has any orange to me, but the photo is in pretty poor lighting, and color consistency from the camera to the poster's monitor to my monitor may be an issue as well, so it's hard to say for sure. It's definitely at least hypo or super hypo (TBH, I forget what the definition of the exact difference is there).
Mountain bikes are for slow people, and reptiles are far better pets than cats & dogs!