Team BKool CycleChat

[Perky77]

Evening Perky. Yes they can. More fun if you join in at 7pm Thursdays and 5pm Saturdays though.

Those two times are going to be tough - 7pm is in the middle of getting the children to bed and 5pm Saturday we are usually out doing something. I can do the handicap at 8pm on Tuesday's though, work dependant

 

[Bored Man]

Jim. I don't see you in the list of group members or those requested to join. You'll need to request to join from the bkool website. there's no way for us to add your name without you doing that first. Post here when you've done that then you'll be ready to join the race tomorrow.

Hi,

I think I'm in now. I've gone on to Bkool and the chain gang is in my leagues and groups.

I'll try this afternoon.

Thank you.

Jim

 

[gbrown]

Thanks Geoff, just done the stage tonight. That hurt!

Straight to the top of the classification, well done!

As a reward, you've earned yourself an extra 2kg!

 

[bobinski]

In my quest to gather data to compare different model trainers, I have created a little flat session "trainer speed comparison" I set a password of "cyclechat" (all lower case), Bkool didnt ask me for it though?

Have a go, let me know which model Bkool you're using and post the ride on here to view
Go as high a level you're comfortable with

I set my weight to 80kg(176.04 lb) ramped up in 50W increments whilst trying to maintain around 90prm. It not so easy to maintain wattage, but you can get a good guide to what speed relates to wattage.

Here is my attempt http://www.bkool.com/bkoolSessionHistory/showSessionSummary/2865843
Wahoo Kickr
150W~19mph
200W~21.5mph
250W~23.7mph
300W~25.3mph
350W~27.5mph
400W~28.6mph

sharp sawtooth tops recorded from the kickr

Must admit its get quite tough

andy,
i had a quick go this morning.lots of issues not least i know bkooL is NOT reading accurate cadence. I normally pedal at 95 ish and know when i am. Nor could i hold consistent power. I went off to set up an erg based session in zwift to replicate what we want and will try and finish tomorrow so we can use that by way of comparison before coming back to bkool and trying again very quickly just now. my speeds next to yours.
150W~19mph-18.9
200W~21.5mph-21.9
250W~23.7mph-23.4
300W~25.3mph-26.1
350W~27.5mph-27.4
400W~28.6mph-30.00

Holding 400 was nigh impossible:i was either accelerating or decelerating to hold it. Time constraints meant i couldnt stay long enough for consistency. It must be possible to set a ramped training session in bkool where once you hit the next watts ramp you just try and hold steady cadence.

anyway, i would not trust the 400w readout. One immediately before showed 31 ish and one just after 29ish so i took 30 as an average. Remember i use ant+fec so, if my numbers are accurate that may explain why they are close to yours?

 

[Soarerv8]

Straight to the top of the classification, well done!

As a reward, you've earned yourself an extra 2kg!

View attachment 144262

Geoff enjoys the power he wields here

 

[Soarerv8]

Who is up for the 5pm re run this evening? Would you be kind enough to ride just in front of me and tow me along please.

Thanks awfully

 

[Perky77]

Straight to the top of the classification, well done!

As a reward, you've earned yourself an extra 2kg!

View attachment 144262

What a lovely reward for all that pain!

 

[theboxers]

Who is up for the 5pm re run this evening? Would you be kind enough to ride just in front of me and tow me along please.

Thanks awfully

If l could sit back and watch later. I'd offer words of encouragement , to those taking part .

Not wishing to put anyone off , but 120 laps @ a constant speed just below your max is hard bloody work . You do get a draft from riders going past you, but on your own you can add 20-40w extra required to maintain your speed. Enjoy yourself this afternoon

 

[theboxers]

What a lovely reward for all that pain!

Don't antagonise . He will get you .

 

[AAAC 76C]

Could be interesting to know and should be simple to test. I could just do two velodrome sessions averaging the same power.

It would be bonkers not to use your wheel speed as your speed but seeing as Bkool uses your wheel speed to calculate power coupled with the resistance set there could be some mad logic in using your power meter reading and the 'conditions' (weight, slope, road surface) to back calculate speed but that's like admitting that your algorithm to calculate power was wrong in the first place as your power, even with a power meter, is proportional to the resistance set.

Wouldn't we just love to have an open forum with the script writers!

 

[AAAC 76C]

Apologies for being absent from everything. I have been spending time and money not fixing the car.
My sure fire, pin it down to two possible items and then try the cheapest first, did not work.
Good news is I can now put my car on jack stands, remove the front wheel and arch liner then support the engine, remove the drivers side engine mount and lower the engine in about half an hour.
Note to self, make sure you tighten the chassis engine mount nut once you have lowered the engine back onto the mount otherwise the engine rattles a bit on start and acceleration and might even jump off of the mount when going over speed humps.

 

[Soarerv8]

Not that I am looking for excuses you understand but I would like to make it clear that I went in to work this morning and got stabbed with a flu jab by a nurse. If my performance is not of its usual quality then this is quite obviously the reason why.

 

[bridgy]

Not that I am looking for excuses you understand but I would like to make it clear that I went in to work this morning and got stabbed with a flu jab by a nurse. If my performance is not of its usual quality then this is quite obviously the reason why.

Unless you were jabbed in the leg I don't think we're having that...

 

[LBHIFI]

Ah, interesting - sorry I didn't pick up on that earlier.

The thing is, does Bkool use your power meter to actually work out the speed, or is it taking speed from the roller in the same way as normal, but just displaying your power meter data instead of it's own power calculation?

Edit: If the second is true, your speed/time would be the same on any given ride as if you'd ridden without the power meter, it would just show a different power reading based on your power meter instead of its own calculation

I did 3 sessions on a completely flat course and tried to hold it at 200 watt.

I get similar speed to Bob and Andy using Bkool power:
http://www.bkool.com/bkoolSessionHistory/showSessionSummary/2877997

When I use BePro power It takes a lot longer for things to settle in, and it does that at a considerably higher speed (24.24 mph):
http://www.bkool.com/bkoolSessionHistory/showSessionSummary/2878028

The last test was maintaining 200 BePro Watts, but using Bkool power:
http://www.bkool.com/bkoolSessionHistory/showSessionSummary/2878176
Here things seem to settle in at about 22.62 mph at 220 Bkool Watts.

 

[TobiC]

TobiC
Are you on strava? might be useful to compare your reverse mountain route ride with one of mine?

I am on Strava yes. I'd be happy to compare it.