This is my second one. I bought the $300 mountain one when they first came out. They were running a promotion of 20% or 30% off if you brought in your old helmet. I gave them my daughter's broken, outgrown helmet. (I asked. They cut the straps off and throw them out.) I got the $150 road one. It has better ventilation and slightly better test scores than the $300 road one (which looks the same as my mountain one, sans removable vizor.)
I took the vizor off the mountain one and used it briefly on-road. To test its propensity to over-heat, I put the chain in the large chainring and went up my favorite 13% grade (the road even has the name "grade" in it), and the mountain one definitely gets a bit warm.
My son got the identical $150 road one a few months ago. He rides hard, sweats a lot, and he is totally comfortable in the Bontrager Specter Wacecel. (He is similar in build etc to me, except has muscle where I have fat deposits).
Last edited by Cyclist0108; 04-24-21 at 11:10 AM.