Master Limper wrote:
I'm a former competitive middle-distance-to-5k runner, now a master with a knee bad enough that running is no longer an option. Cycling causes no problems, though. So is there a way to reproduce the running experience via cycling, i.e. the ability to get in a good workout and even race without too-expensive gear or four-hour workouts? Is mountain biking in that category or is it gear-focused like road cycling seems to be? Thanks for any advice.
Yes, Dial It Up gets it right. You can hammer on a road bike ride and get a very good workout. No need to ride four hours until you plan to race.
Don't expect your running pedigree to necessarily carry over to cycling. I rode with a... um, heavy... guy a while back. I thought I'd be waiting at the top of every hill for him, but he crushed me.
I'd suggest you buy a used bike. Top of the line aluminum is as good as average carbon. You should be able to get a used Cannondale CAAD 10 for a little over $1,000 with reliable (Shimano 105) components. It's aluminum and an outstanding value. I have one. Ride it for a year. Figure out what you like and don't like. Then, sell it on CraigsList for maybe $200 less than you paid for it. And then buy a bike you really like once you figure out what you like and don't like.
You need a good helmet, but there's no need to buy a hyper expensive helmet. The top of the line helmets just have more air vents and are a little lighter. You pay about $100 more for that saved ounce or two. That's not important to you as a beginner or even as a racer. Save a bunch by getting a top-rate middle level helmet on sale. Check out PerformanceBike and Nashbar for gear deals.
The only place you might want to splurge is on shorts, but the Chinese knockoffs on eBay are surprisingly good. Sizes are ridiculously off so go by the measurements listed in the auction. I'm 5'5" 135 and wear a Large in this Chinese gear... go figure.
Mountain biking is a lot more adrenaline rush, but the risk of injury is higher and your knee might not be able to handle it. I'd say it's even more gear focused than road biking. If you're a decent cyclist, you can keep up with a $4,000 road bike on an old $800 Cannondale CAAD 9. That won't be the case when mountain biking... at least that's my opinion. The difference between my $1,000 mountain bike and my buddy's $3,000 bike is night and day. Maybe my bike is junk, but that's what my limited experience has been.