Sebastian Koster

Sebastian @sebas.koster , or “Big Seb,” is joining TMB for 2026. After a year racing across the U.S. and spending time in Europe, he’s headed back home to NorCal. Seb started racing through NICA, and he’s been building year over year ever since. Off the bike, he’s a first year applied math major. Seb has already notched an early result in TMB colors with a solo win at the SLO 2/3 crit, and he’s been a fun rider to watch. Lately he’s been describing himself as the next coming of Jonas Abrahamsen, NorCal breakaways will never be the same. We’re excited to have him back in the mix this season, and we’re looking forward to seeing what he gets up to with the team. 2nd Kooigem Kermesse 2nd Golden State Race Series TT 3rd Cantua Creek p12 12th 17-18 TT Nationals

This Thanksgiving, I have many thanks that I want to give, but one of the biggest ones is to Hot Tubes. Not long ago, I would have struggled to imagine all of the amazing experiences that I had this year and all of the incredible people I have met. I want to specifically thank: -Toby for giving me a shot on the team and being a great person to learn from -Mike for making sure all of the equipment is top-notch, -Franky for bringing me up to speed in Europe and giving endless wisdom. I learned and achieved so much in my year on the team. I really wish I joined earlier, but such is life. Exciting things await in 2026, but #htfl in my heart. Thanks to the sponsors that made all of this possible: @hottubescycling @envecomposites @wahoofitness @speedplaypedals @vergesport @pinarello_official @kask_sport @ride.shimano @julbo_eyewear @waltonenduranceco @firstendurance @usacycling @blackswiftgroup @procyclistfoundation Domestique Foundation Kempner

Happy to get my first win of the season at the Beat the Clock Time Trial put on by @penveloracing ! Stopped the clock at 21:06 on a rolling course with plenty of climbing. A huge thanks to Hot Tubes' sponsors for making my setup possible: @envecomposites @wahoofitness @speedplaypedals @vergesport @pinarello_official @kask_sport @ride.shimano @julbo_eyewear @waltonenduranceco @firstendurance @usacycling @blackswiftgroup @procyclistfoundation Domestique Foundation Kempner