Anoutway AT1 Max Mini Electronic Pumps (Black) Warranty-2 Years and these babies fit up

and these babies fit up to 8mm valve holes

Airflo - designed for optimum temperature control by allowing moisture to easily evaporate from the skin and help keep the body cool or warm depending on the conditions

the inside for shifting the cassette

but in winter

Anoutway AT1 Max Mini Electronic Pumps (Black) Warranty-2 Years and these babies fit upDesigned for more demanding applications, the AT1 Max accommodates higher volume needs like mountain bikes and motorcycles, all while maintaining portability. AT1 Max is slightly larger than AT1 Pro model, with sufficient battery power to handle mountain bike or motorcycle tires. Yet, it remains pocket sized, making it a convenient companion for your travels and races. Features AT1 Max mini maintains the lightweight and compact nature of the AT1