Or the other way around?
Why would you choose one over the other?
I use an SRM because I like the best. Others will advocate for Quarq saying they are the best but I’m fond of my SRM. My team has a mix of both and they both work extremely well. The Quarq is cheaper and has great customer service (plus you can change your own battery). The SRM is the “gold standard” and used by almost every pro cycling team out there. It’s a matter of preference, price and what brand you like. The Quarq also does not come with a headunit whereas the SRM can be purchased with the PCV (6 or 7). If I had the option to either one of them for free I would snag both.
The Quarq is cheaper (snip).
Only if you buy new. I chose SRM because they can be found used all day long on eBay. They’re solid so I was quite comfortable finding a used one, sending it in for new batteries and and a once-over for peace of mind, and training away. Used SRM + factory service is thousands cheaper than new SRM or new Quarq.
Isn’t Quarq now owned by SRM?
Quarq is now owned by SRAM
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The Quarq is cheaper (snip).
Only if you buy new. I chose SRM because they can be found used all day long on eBay. They’re solid so I was quite comfortable finding a used one, sending it in for new batteries and and a once-over for peace of mind, and training away. Used SRM + factory service is thousands cheaper than new SRM or new Quarq.
How can it be thousands cheaper than something that cost $1800?
The Quarq is cheaper (snip).
Only if you buy new. I chose SRM because they can be found used all day long on eBay. They’re solid so I was quite comfortable finding a used one, sending it in for new batteries and and a once-over for peace of mind, and training away. Used SRM + factory service is thousands cheaper than new SRM or new Quarq.
How can it be thousands cheaper than something that cost $1800?
SRM powermeter + PCV for $800 off eBay is thousands cheaper than Quarq PM for $1800 + (add head unit here). (OK, OK, more than a thousand cheaper, if you want to get technical 
I was assuming he was asking about wireless models since Quarq does not make a wired model. I agree that the wired SRM can typically be had for less than 1k and are a great deal. I was looking to snag one off ebay for my road bike.
Quarq (new) $1800 or so…+ $200-$600 for headunit depending on which one you go with
Quarq (used) $1100-$1500, not much different but still cheaper…+ $100-$300 for used headunit
SRM (new) $2700-$3900 depending on model, includes headunit (PCV 7)
SRM (used wireless) $1300-$2000 depending on model (may or may not have headunit)
SRM (used wired) $700-$1200 depending on model/condition, usually comes with PCV 5
And yes, SRAM now owns Quarq and will make the unit primarily SRAM based but will still service and make products for other models…or so I hear, may be wrong about that.
Quarq has a limited selection of power meters and only a couple that fit the 110 bcd compact models. SRM has more models than Quarq. I got a Cannondale Hollowgram compact crankset and my only option is SRM as Quarq continues to state it is a future model but unknown when it will arrive.
Quarq has awesome customer service. You can change the battery yourself.
Or the other way around?
Why would you choose one over the other?
http://forum.slowtwitch.com/gforum.cgi?post=3293609;search_string=quarq%20or%20srm;#3293609
This was a great thread on the topic.
I’m about to purchase a Quarq over a SRM. Initially, I was more in the SRM camp, but some of the comments in the thread by Rappstar made me rethink my decision. I’ve yet to hear a really bad review of a Quarq. Everybody raves about their customer service. The stuff about SRM’s being returned after battery changes and still needing to be recalibreated scares me. The iPhone Qalvin app to adjust the slope calibration sealed the deal for me.
SRM does have a better selection, but I’m interested in a Rotor 3D, so that was not an issue. Since I already have the chainrings, I can save another $260.00. The fact that pro tour teams use SRM means nothing.
I agree that been able to change the battery yourself seems like a great advantage, but sending the unit once 1-2 year at SRM for battery change + calibration is not a bad thing either. By doing so, you always make sure your unit is accurate…
I agree that been able to change the battery yourself seems like a great advantage, but sending the unit once 1-2 year at SRM for battery change + calibration is not a bad thing either. By doing so, you always make sure your unit is accurate…
You can make sure yours is accurate at home in about 10 mins
Just wondering if can you reset the slope of a wireless SRM without a PC7? Like with a Garmin Edge 500?
The actual weight test seems easy either with either Quarq or SRM, the iPhone app just makes it seem real easy to
reset the slope with any head unit.