C2 v Wattbike Pro

Discuss all things related to the BikeErg, Concept2's newest product.
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Marco73
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C2 v Wattbike Pro

Post by Marco73 » November 25th, 2021, 5:00 pm

Hi, newbie looking for some advice.

I have just sold my 6 year old Wattbike Pro as the power was under reading by about 10%

I am a time trialist and have power meters on two outdoor bikes to verify my 20 minute power.

My 20 minute power is 390 watts, I used to just keep the Wattbike pro at level 10 and pedal ar around 90 cadence when doing a 20 minute effort, I didn’t use the resistance knob as I didn’t like the feel of it.

I purchased a Wattbike Atom next gen which confirmed that the pro was under reporting the power as I did a 20 minute Time trial on Zwift and it was higher than the pro. I didn’t like the electro magnetic resistance of the Atom, it has now broke (15 days I had the bike) so Wattbike are given me my money back.

I enquired about a new Pro but they are talking 16 weeks!

Which brings me to this forum, the C2 is the only other bike that I can find is similar to the pro as air generated power rather than magnetic of other smart bikes, are there other bikes like the Wattbike pro in the Uk?

Does the C2 have a comparable resistance to the Pro on level 10 setting as I don’t spin much above 90 cadence and do the two bikes have a similar smooth feel? I just couldn’t get on with the Atom, it just doesn’t feel natural and smooth to me.

Hoping the C2 is my bike for Zwift due to 40% cost of the Pro, also I wasn’t interested in all the gimmicks of a smart bike, just want a bike to give consistent accurate wattage, not interested in resistance on hills or ERG mode for training.

Thanks

jamesg
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Re: C2 v Wattbike Pro

Post by jamesg » November 26th, 2021, 6:22 am

C2 has a 30 day money back offer:

https://www.concept2.co.uk/bikeerg/concept2-bikeerg

The power measurement system seems to be very robust with no zero, linearity or drift problems, needing to know only flywheel inertia and speeds and being able to self calibrate.
08-1940, 183cm, 84kg. Last seen MHR 158 in 2k = 220 - 77% of age.
2021-2: stroke 6 W-min. ½k 1:55.5; 1k 4:09.2; 2k 8:42.2; 5k 23:15; 30' 6247; 10k 49:36.

Marco73
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Re: C2 v Wattbike Pro

Post by Marco73 » November 26th, 2021, 10:32 am

Thanks for the reply jamesg, I didn’t know about the 30 day return, I am just about to order it :D

I was struggling with getting my head round paying £980 for the C2 against £2500 for the Pro, I thought the C2 must be inferior but from all the reviews online and on YouTube, that doesn’t seem to be the case.

Just looking for accurate and reliable power, which this does.

CaseyClarke
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Re: C2 v Wattbike Pro

Post by CaseyClarke » November 26th, 2021, 10:44 am

I’m very familiar with both.

C2 BikeErg on a damper 10 (Drag 220-230) at about 90rpm is far stiffer than a Wattbike Pro on 10. Well in excess of 700w at ~90rpm.

Wattbike Pro would only be ~390-400w at air setting 10 at 90rpm.

But if you also use the magnetic resistance on Wattbike Pro and turn that up to 6 or 7, then that’s going to be stiffer than the C2 BikeErg.

You’ll also find the C2 under-reads a bit compared to the Wattbike and most other devices reporting power. That 390w Wattbike 20 minutes will likely translate as ~375w ish on the BikeErg.

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johnlvs2run
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Re: C2 v Wattbike Pro

Post by johnlvs2run » November 26th, 2021, 12:22 pm

Marco73 wrote:
November 25th, 2021, 5:00 pm
I am a time trialist and have power meters on two outdoor bikes to verify my 20 minute power.
Here's a comparison of drag factor, cadence and watts <-- on the C2.
I'd be interested in how your power meters compare to the C2 watts reading.
The cranks on the C2 can't be changed, the power meters would need to be on the pedals.

Marco73
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Re: C2 v Wattbike Pro

Post by Marco73 » November 26th, 2021, 3:52 pm

Thanks for the replies

Casey, I'm not too bothered about the underread, although not great for Zwift TTs :lol: but as long as it's accurate and repeatable once I get back into my training plan.
Level 10 on wattbike was fine for me, I just couldn't get on with the magnetic resistance but more than happy to find out that the C2 can handle the resistance with the damper.

John both my bikes have power2max power meters. I have ordered the bike today but it's saying 7 to 10 days after the 1st December.

Once I get the bike setup, I'll post up a 20 minute workout.

Thanks for all the replies, eased my mind and saved a lot of cash.

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Ernits
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Re: C2 v Wattbike Pro

Post by Ernits » November 27th, 2021, 10:05 am

Why not go for a smart bike instead? If you have Wattbike money, you could also afford the Tacx Neo Bike, Kickr Bike or Stages SB20 Bike.

Marco73
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Re: C2 v Wattbike Pro

Post by Marco73 » November 27th, 2021, 12:37 pm

Hi Ernits, I usually check out reviews for tech stuff on DC Rainmakers website.

Every smart bike he has reviewed has had people reporting problems, I took the gamble on the Wattbike Atom, due to previously having the Wattbike pro. The main reason I actually went for a smart bike is because Wattbike have a 16 week wait for a new Pro or I would have purchased one.

I just couldn’t get on with the electro magnetic resistance of the Atom, I also didn’t like the additional resistance on the Pro via the magnetic resistance either. I am just wanting a bike that too me is smooth and that I can train on with air resistance.

I actually seriously considered both the Stages and Taxc, I get a good deal off Garmin through my work, I can actually get the Tacx smart bike for £400 cheaper than an Atom. The reason I never purchased the Tacx is because I came across the Concept2 bike, so I am willing to give this bike a try as the bike should hopefully have a similar feel to the Wattbike Pro.

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Carl Watts
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Re: C2 v Wattbike Pro

Post by Carl Watts » November 27th, 2021, 10:22 pm

Marco73 wrote:
November 27th, 2021, 12:37 pm
Every smart bike he has reviewed has had people reporting problems
Thats the problem with reviews in general. people are very quick to complain or report a problem but very few of the happy customers bother doing a review.

Its a also a bit like trying to get information on someone's max Watts power on the their bike trainer vs their C2 rower, suddenly there is silence and nobody is interested.

People will sign up to this forum just to get help with a problem with their rower but then you will probably never see them again.
Carl Watts.
Age:54 Weight: 108kg Height:183cm
Concept 2 Monitor Service Technician & indoor rower.
http://log.concept2.com/profile/863525/log

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