>>1247658Panaracer Gravelking 700x26.
>>1247894I doubt that those were even $100 new when they were being sold 10 years ago.
One thing to look for is internal rim width. If you're planning on running tires wider than 25mm (or, really, wider than 23mm), it's a good idea to get wheels with internal width of 17c. Pic related is a decent chart of what goes with what. If you're planning on 25mm-32mm, 15c rims will work, but as the tire size rises, the tire will take on an increasingly bulbous shape, and will increase the slip angle of the tire's contact with the road when you're cornering. The more slip angle, the more sketchy and vague the bike handles. A slightly wider rim can make a big difference. Since everyone is moving to wider tires now, narrow wheels are being dumped.
That said, the cheapest decent 17c wheels that I know of are the Campagnolo Calima C17. If you're not planning on going above 25mm tires, Shimano RS11 are a good bet. Both can be had for around $150 if you look around the internet.
>>1247721>>1247731You can't modify a rim brake frame to take discs. Discs exert a lot more force on various points on the frame and fork. And you can't modify a carbon frame at all. Buying old used carbon is a bad idea, double bad from ebay. You don't know if the PO mistreated the bike, and small bumps in the wrong place can make carbon crack. Worse, the cracks can be inside the layup and impossible to detect unless you have an x-ray machine. Carbon manufacturing has come a long way in the last few years, too, eliminating a lot of trouble spots where cracks would occur.
