I have always kept my bikes inside, including the BMX bike I rode as a kid. These days, my flock of bikes take their naps in the comfort of my locked garage, behind the security of my double-dog alarm system. I do this because I was raised right by a guy who was also a bike nut.
In related news...I was at an LBS recently, and while I was waiting for some help, a guy there ahead of me was explaining to the service manager that his bike was having some problems. It was a pretty high-level, pretty new, full-suspension MTB. The cranks and wheels would barely turn, and everything was scaping and grinding when they tried. Apparently, it had been left outside in the weather for 4 months. The owner didn't seem to understand why that was an issue. It made me both sad and angry.
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RIP 01/08/25...2022 Trek Supercaliber, 2018 Storck Fascenario.3 Platinum, 2018 Trek Procaliber SL Singlespeed, 2017 Bear BR1, 2003 Time VX Special Pro, 2001 Colnago VIP, 1999 Trek 9900 singlespeed, 1977 Nishiki ONP