You should.
Last night I almost crapped myself. A huge loud bang in the dark woke me up. Light still worked, laptop still worked. So not electrical. Baffled for 10 mins. No odd smells, no smoke. Then I looked at the chair next to my bed. Cheap stupid chinese brand new caster tyre. Split open. Tyre seal gunge all over...
These were a batch of 8 that came from amazon. They looked a bit nasty. Not rubbery but sort of plasticy. Well I just threw all 8 with cheap tubes into the bin. Fortunately, I bought 8 of these on eBay, and they seem exceptionally GOOD quality, and have no centre tread rib, so more solid. And they actually smell like tyres! Strong rubber smell.
I wish the chinese would stop making identical looking super low quality garbage. I bought the 8 replacements just because I suspected them. But it meant that this morning a matter of 20 mins and I had 2 brand new ones, and 2 new tubes all fitted and awaiting me to leave this bed.
The ones pictured ae not the better quality ones he shipped me.
https://www.ebay.co.uk/itm/SET-OF-4-X-T ... 2749.l2649None left now.
I bought 4 tyres/tubes, and when I saw the quality I got another 4. I now have 6 left "in stock" so to speak, and 4 chairs with as new tyres...
I have spare drive tyres, and wheels already fitted, since tubeless. I have spare pilot plus and r-net controllers (3 full spare sets of 120A systems) , joysticks, a seating lift tilt module complete, bus cables, power modules, arm pads, upholstery, draws full of bolts, nuts, washers, plastic breakable parts, actuators, fuses, and bearings. You MUST do this, and also have at LEAST one ready to rock backup chair.
Caster tyres.
3.00 X 4.
I bought 8, a few days apart. Why? They were quality, last me months, in summer. And you MUST have spares.