Bike costs are a bit more fuzzy. Is the cost of a cycling helmet or a can of 3-1 part of the price of cycling?
Is having to pay £3 a day to leave my car at home when I cycle to work, a cost of car ownership or a cost of cycle commuting?
In my case the helmet / maintenance tools / etc
are all part of the cost. They're on a big spreadsheet with bikes (plus value/type) along with the current value of everything I have (bikes/wheels and parts/tools/clothes). That's totalled and my number of commutes is taken off that.
What muddies things a bit is everything bike-related I sell is taken off the total spent as I've paid out
and earnt back: most of my bikes are sold on for a profit which has reduced the cost. I've also got all my rides on there, weekly mileage totals and weight from 2011-2020, although I've not updated that since April as my mileage has dropped so I let Strava tackle it.
Currently having sold some bib longs today but bought a cassette and a replacement LH Ultegra crank:
Spent since April 2011: £12,070
Commutes to work 1169 at approx. £10 a day: £11,690 saved
Balance: - £380 (which if I'd commuted to work since March would be a big positive)
However I
still own the 12 bikes (dotted about in various places/lent out)/ wheels and parts/tools/clothes and my estimate is they're currently worth about £8620. So ... I'm over £8000 up in 9 years.
One note: three of the bikes were on Cycle2Work so I saved on the tax but lost out on pension contributions. I didn't factor that in, just the purchase price.
If you're paying to leave the car at home it's a car cost.