Training with rollers - Tacx Galaxia

[MORNE]

just an observation...anyone who thinks you'll go charging through the wall in front of you when coming off your rollers at at max effort..... you guys need to revisit your grade 10 physics homework lol.

The inertia/momentum in your ~2kg wheels will NOT overcome the weight of your sweaty Lycra clad ass + the bike lol. you'll come to a dead stop...and fall over. if you move 5cm you'll be lucky.

[EddieV]

just an observation...anyone who thinks you'll go charging through the wall in front of you when coming off your rollers at at max effort..... you guys need to revisit your grade 10 physics homework lol.

The inertia/momentum in your ~2kg wheels will NOT overcome the weight of your sweaty Lycra clad ass + the bike lol. you'll come to a dead stop...and fall over. if you move 5cm you'll be lucky.

 

mmmm ... in the beginning I came off frequently... but at that stage i had a straight profile drum roller, got the Galaxia only much later.

But yes, you don't move forward when you fall, the trick would be to get yourself un-clipped before falling onto the rollers ...  it almost always hurts   

Edited April 8, 2020 by EddieV

[DieselnDust]

just an observation...anyone who thinks you'll go charging through the wall in front of you when coming off your rollers at at max effort..... you guys need to revisit your grade 10 physics homework lol.

The inertia/momentum in your ~2kg wheels will NOT overcome the weight of your sweaty Lycra clad ass + the bike lol. you'll come to a dead stop...and fall over. if you move 5cm you'll be lucky.

 

 

Yes Morne but that doesn't make a great story.....

 

However if you go off the front of the Galaxcia roller, when the bike comes to a stop the rider falls forward and the roller goes backward,because its got two wheels on the front and  a pair of rockers at the rear

Edited April 8, 2020 by DieselnDust

[Martin PJ]

https://www.kreitler.com/wattage-information/

 

Check out this link, some wattage measurements for different diameter rollers. The Tacx are 3.93 inches in the middle, so you can work out a table for your weight and tire pressure based on this. I have done this for myself and it appears pretty close.

[MrJacques]

The rollers are hard work great work out. Love it. Just not for a loooooong training session. Things go a bit numb.

 

I find shifting positions, like riding with no hands for a bit helps.

[MORNE]

Yes Morne but that doesn't make a great story.....

 

However if you go off the front of the Galaxcia roller, when the bike comes to a stop the rider falls forward and the roller goes backward,because its got two wheels on the front and  a pair of rockers at the rear

...but thats like telling somebody that doesn't know that cross chaining is a deadly sin and leads to ebola....all while knowing the pro's call it the 'pro gear' for a reason.

Someone might read this and not even try...from the debilitating fear of destroying their 60" curved LED tv in technicolor loony toons fashion.

Edited April 8, 2020 by morneS555

[EddieV]

Does anyone know where I can buy (strong) magnets from in Cape town

 

Want to do something similar to this .... to add more resistance while on the rollers.

 

https://www.youtube.com/watch?v=uyaq5XnumZ0

[DieselnDust]

Eskom

[MrJacques]

Does anyone know where I can buy (strong) magnets from in Cape town

 

Want to do something similar to this .... to add more resistance while on the rollers.

 

https://www.youtube.com/watch?v=uyaq5XnumZ0

 

Break open some old hard drives.

[EddieV]

Break open some old hard drives.

 

I managed to get some magnets, not very strong but good enough for a test project. Most IDT's use magnets internally.

 

I used the brake calipers to attach the magnets glued to a aluminium plate.

I can use the brake block adjuster on the brake calipers to quickly vary the distance of the magnets to the rim.

 

Anyway, here's the end result.

 

I'll order some neodymium magnets, and I'll lace another deep section alu rim to my powertap. I love this setup:

The Powertap, and cadence sensor allows me to ride Zwift realistically, while the tacx rollers allows the bike to move naturally from side to side, to build core too, and now with added 'silent' resistance, I can use it at night time too.  

Edited July 12, 2020 by EddieV

[ChrisF]

Eddie please monitor the tire pressure ...

 

The resistance is based on magnetic induction, resulting in LOTS of heat .... seems this heat goes into the rim, thus heating the air and increasing the pressure....

[Mongoose!]

1. Was very proud of myself when I managed to ride the roller without leaning against something to hold my balance.

 

2. Next level : I was able to watch TV while riding and not constantly watching the front wheel for not slipping off.

 

3. Next level : I was able to drink water while riding and put my bottle back into (and from) the bottle cage . 

 

4. Next level : I managed to ride no hands. I still struggles with this (grabbing the bars again before something goes wrong...) , but from time to time get it right.

I found that tyre choice and tyre pressure play  a huge role on this.

 

Most of my training I do on my Kickr, but love to ride Fridays on the rollers, with the bike I'm going to ride outside that weekend.

 

Obviously I am a roadie 

Edited July 13, 2020 by Mongoose!

[EddieV]

Eddie please monitor the tire pressure ...

 

The resistance is based on magnetic induction, resulting in LOTS of heat .... seems this heat goes into the rim, thus heating the air and increasing the pressure....

 

Thank you, yes, I was concerned about that too. On the 4iiii IDT they recommend having a lower air pressure in the tyre, but you can't lower the pressure too much on a roller.

I haven't done more than an hour at a time. Will monitor. Was also thinking that once I have a deeper section rim laced the heat will be better dispersed/dissipated? 

[Paul Ruinaard]

I loved rollers but i had some lurid get offs when things went pear shaped. Other than the stories i have never confirmed about the guy pedalling at full tilt and then going through the fish tank i had the following happen:

 

1.) Training in the door frame and then falling off and smashing my collar bone against the door jamb. I nearly broke a collarbone falling off rollers.

 

2.) A mate who was much better than me who was watching motogp on the rollers. He leaned in to a corner as the bikes did in front of him except he wasn't going at 180 kmh and the centrifugal force did not hold him up. Then he told us the story. I have dined out on this one for a long time.

 

Rollers are going to make you super smooth and are so lekker and minimalist as a training tool. Really helped my pedal strokes. You are really getting good when you can transition to out of the saddle sprints adn then sit back down again

 

[Paul Ruinaard]

I managed to get some magnets, not very strong but good enough for a test project. Most IDT's use magnets internally.

 

I used the brake calipers to attach the magnets glued to a aluminium plate.

I can use the brake block adjuster on the brake calipers to quickly vary the distance of the magnets to the rim.

 

Anyway, here's the end result.

 

I'll order some neodymium magnets, and I'll lace another deep section alu rim to my powertap. I love this setup:

The Powertap, and cadence sensor allows me to ride Zwift realistically, while the tacx rollers allows the bike to move naturally from side to side, to build core too, and now with added 'silent' resistance, I can use it at night time too.  

Amateur science project.

 

Now if you reverse the current in the magnets with a battery you can turn the wheel in to an armature and have yourself an ebike when outside on the road.

[EddieV]

And so it did fail .... not spectacularly ... I went pretty hard, setting the clearance as small as possible between the rim and the magnets, and stood up out the saddle for a few minutes at a time .... about 50 minutes in the tube failed. First time I managed to get a flat on a roller         

 

Rim was very hot ... wondering whether I should invest more time into this experiment? ... and whether it will be worth trying a much deeper cheap alu section?

 

I have an old pair of EA50's I can lace.

 

For now I'll go back to my old Racermate Wind Trainer on the roller ..... 

 

 

Eddie please monitor the tire pressure ...

The resistance is based on magnetic induction, resulting in LOTS of heat .... seems this heat goes into the rim, thus heating the air and increasing the pressure....

 

 

Thank you, yes, I was concerned about that too. On the 4iiii IDT they recommend having a lower air pressure in the tyre, but you can't lower the pressure too much on a roller.

I haven't done more than an hour at a time. Will monitor. Was also thinking that once I have a deeper section rim laced the heat will be better dispersed/dissipated?