Can you elaborate more on these? Indoor rides don’t take life off brakes, tires, can use a different/cheaper rear cassette.
No dust, dirt, mud, etc.
The only really villain is sweat and you can easily put a towel over your stem and such or just wipe it down. Sweat is going to happen outside as well.
I don’t do any structured/systematic training outdoors either. I ride outdoors because that’s what I want to do. The only training I do is indoors on the trainer due to WX or other circumstances, and I only do that in support of riding outdoors.
Outside of the benefits of nature, fresh air, etc.
Training/riding on an indoor trainer will get you better at pedaling a bike.
Training/riding outside will get you better at riding a bike.
If you are super time crunched and only care about your ability to pedal, then sure go 100% inside. But bike riding is more than just pedaling.
When I train outside I get 95+% of the benefit with at least 5x the enjoyment. Even in spite of the crashes, flats, etc.
Main issue with gyms is the lack of fans.
I took power pedals to an exercise bike and did some TR workouts but nearly died of heatstroke. Then there’s all the weird looks from gym goers - which also tells you how hard people work out in gyms. Perhaps interestingly though, it didn’t effect my RAMP test results - same as at home, it’s the RPE that’s the issue really.
They won’t let you bring your own fans in either 
- trip hazards.
Imagine living in a place like Bentonville, Denver, Bend, Asheville, etc and only riding a trainer. Everytime I travel to these places I don’t even want to go inside except to sleep, and 5 hour rides seem too short. Low traffic, amazing scenery and weather, basically a playground for two wheels. If you live in downtown LA or somewhere like NYC, sure go ride a trainer, otherwise 
Which let’s face it, are once in a blue moon occurrences.
Bluetooth connections not working indoors would be a big irritant you don’t get outdoors.
A portable AC is the best indoor training accessory one can buy. They are also cheaper than a smart trainer and you can probably buy one for $50 right now in the middle of winter.
I vote this topic as best troll post ever!
Let’s face it. Cycling is not the greatest exercise for being healthy. You sit on your butt for hours and hours. Some kind of elliptical or climber or a treadmill is probably the best pure aerobic conditioner. I love my Concept 2 rower for an all body exercise though you are still sitting.
Probably doing a variety of exercise - some aerobic, some resistance, walking, hiking, skiing, swimming is better for health span for cycling.
Hear me out…take the trainer outside…best of both worlds.
I ride outdoors to show off my look in lycra 
I’ve tried that too but getting the TV set up outside was just too much hassle… 
The only reason to train indoors in my humble opinion is if it is too nasty outdoors. Yes, I know indoors is more precise, especially with the great TrainerRoad sessions, but it is boring. Lots of data now showing just being outdoors is healthy. I am lucky. I live in New Mexico at 6000 feet and we can ride nearly year around, but it is still cold in the winter-I ride in 25 degree F. weather all the time and on a mountain bike with heated gloves down to single digits. I used to work at the US Embassy in Ottawa and my record was commuting to the Embassy in -30 F on a fat bike. If you have the right clothes, it is still more fun being outside. Rain in the 30’s F is the worst and I will not do that.
In the Netherlands we call that waterkoud, water cold, it’s by far the worst kind of weather. I am surprised English doesn’t have a word for it though…
I don’t have an indoor trainer. I won’t have an indoor trainer. I live in Sweden (having moved from the UK) and rode all through winter last year (over 1000km a month). There isn’t really a need to have an indoor trainer unless you live somewhere that’s particularly ill suited to cycling.
I would argue that if outright fitness is your goal, that @ [AJS914] is correct with their recommendation for a Concept 2 rower. I recently got one again (after having had one years ago) and I’ll be leaning on that more this winter and reducing my outdoor rides a little. It is objectively a better work out than cycling, and it’s far easier to get into the upper HR zones as it’s taxing your entire body. It’s also boring as hell, but you don’t have to use it for long for massive benefit.
But every opportunity I have, I’ll be out on my bike, on studded tyres, whizzing around the gravel roads, through the forest, marvelling at the changing seasons, keeping an eye out for moose or white tailed eagles and enjoying all the benefits that cycling bring that are beyond simply pushing out the watts*
I don’t know what “30’s F” means but the word could be ‘sleet’ - an icy kind of rain.
Water cold isn’t so much about the precipitation but more about the unpleasantness of high humidity near freezing temperatures
Clammy is probably the nearest English word for that.
Could be oorlich but that’s not a word we’d use in the south, it’s a northern dialect.
