I currently use ProAir inhalers, which is essentially albuterol. Thankfully the asthma only affects physical activity for me when it is really cold, but I rarely have any issues in the summer. Spring and fall can be tough due to allergy seasons, though. My asthma has gotten better over the years: I went from needing a nebulizer 3+ times per day when I was younger to now using an inhaler only as needed (and I can often go weeks at a time without it in warm months).

The fact that you don't have any issues until after your ride is quite odd, and I think I'm going to join the others and say try new treatments. I've been on Singulair before and don't think it did much for me, though, and inhalers have been the best route the last few years.