Rajflyboy

I don’t race bikes. Why do I need one?

dedhed

You don't

shelbyfv

Only if you are fast enough to warrant buying a Trek.

spelger

I don't race bikes either but if i could afford a power meter i would likely buy one. I only compete against myself. I ride because i like to and i like to improve. A power meter is something that can better gauge improvement compared to just time and distance because it takes other factors into consideration (indirectly).

Homebrew01

A power meter is a measuring device. Some people like to measure, others don't.

Even if you race, you don't need one.

PepeM

Fun toy. Nobody needs one. I have a few.

N00b_Cyclist

I had to buy pedals regardless...so I figured why not just snag some with power meter? No real reason other than that. Might come in handy down the road.

DrIsotope

As a guy with a PM on every bike, I 100% agree.

But they are very handy to have, if even only for use as a fuel gauge.

Rajflyboy

Good point as use for a fuel gauge

I like Trek. I’m just shocked at how many of them I see on road and trail.

kcblair

I have one, cause I got a deal and I like collecting data. KB

Hammer_Head

Prolly get a used one cheap if interested, but not sure if you want to commit big time.

honcho

I'm still waiting for power meter pedals usable with mountain style spd cleats so I can put two sets on our tandem to figure out our individual contributions. Supposedly, such pedals are coming "real soon now." Neither of us is willing to move to road shoes/cleats. There's no need for knowing, just info that would be fun to know.

burnthesheep

Toys are fun. We never really grow up. Good enough?

BlazingPedals

How do you know you're dialing it up to 400W if you don't have a power meter?

Rides4Beer

Using it as a fuel gauge is very helpful, especially if you do a lot of climbing. I ride with someone who has one, and when he's staying on a power goal for a long ride, he'll back off more on the climbs than I would if I were riding by myself. Just gauging off of his effort has helped me from going too hard.

biketampa

you don’t need one. It’s nice for training and can help with training but you can also train by HR or RPE or you can just ride your bike however you want and have fun.

CAT7RDR

As a recreational rider, I see no need for one and money can be better spent on other essential gear.

I ride the same route every other Sunday so I can track improvement by reviewing my times as data points and calculate VAM since this is a heavy climb ride.

hubcyclist

I use power meters to train and I do race, but I personally think a lot of non-racers could benefit from power meters if they are enthusiastic about fitness and improvement. Just from a simple level, calorie tracking is far more accurate with a power meter than by using HR or other estimates that are often waaay off. I also think that just having an idea of what one's FTP is and using the power meter as a pacing tool could be helpful for a lot of folks.

I see a lot of people always asking about wheels and such to gain speed, but if people invested in a power meter (cheaper than a lot of wheelsets people look for) and incorporated at least a little structure to riding they'd probably see bigger gains in their riding experience than they would through wheels.

jadocs

Bingo especially the last part.

wphamilton

You need a power meter if you want to objectively measure your efforts in a repeatable, precise manner. Less commonly, if you need to relate your efforts to some measure of speed.

If you're training seriously but not racing (and if someone has to ask "why" they'll never understand), it just depends on how precise you want that data to be.

Phil_gretz

On the plus side, one can only improve what can be measured. So power data are useful to some.

On the negative side, collecting and not using data is like collecting Precious Moments figurines. It might make you feel better at first, but after a while, the collection becomes less than useless...

PepeM

Was it impossible to improve one's power output before the invention of the power meter then?

bbbean 

Who said you do?

Riveting

Training on a bike without a power meter is like going to a gym that has no weights listed on any of the equipment. In either scenario, it's still possible to train by feel, but it's a lot easier to make small incremental improvements when you know exactly how much effort your putting out, relative to the previous workouts in your training program.

gregf83 

Plenty of ways to measure power without a power meter. Timing yourself up a hill of known height is the traditional way. I don't know what riders did before the invention of watches. Tougher to measure time with a sundial