The Official ErgoFiT Thread

[Cippo]

Congratulations and all the best with new venture. May I ask who is your lead fitter /technician?

[ivr32]

Got my appointment on Tuesday, cant wait

[ErgoFiT Bike Fitment]

I wish these services were available in Durban...

 

Check out Velolife Hillcrest!

[Jaco-fiets]

I had a bad experience when I went for my ergofit setup at a well reputed store. Took my mtb and roadbike for fitment. It was done in such a haste. My roadbike had to get the seatpost cut but they were in such a hurry to see next person that they told me not to worry about it. Final adjustment to mtb seat hight was done on guestimation because the person could not care to go fetch measuring tape in office.

 

Had to send numerous mails to ask for my report. About 5 weeks later I received it.

 

Went to see Johan Rabie to setup my bikes again. Much more professional and huge difference in seat hight especially on mtb. Made huge diff in my climbing.

 

Out of principle I wont do ergofit again or advise anybody to use them

 

Have to add that it was not done by the OP. Maybe if it was I would have been a happy customer.

[ErgoFiT Bike Fitment]

Congratulations and all the best with new venture. May I ask who is your lead fitter /technician?

 

We have a few fitters involved. Doctor Jeroen Swart is there on Wednesdays the whole day, and Renay Groustra is there on Monday, Tuesday and Thursday afternoons between 12-5pm. To make an appointment e-mail fittings@sciencetosport.com.

[ErgoFiT Bike Fitment]

I had a bad experience when I went for my ergofit setup at a well reputed store. Took my mtb and roadbike for fitment. It was done in such a haste. My roadbike had to get the seatpost cut but they were in such a hurry to see next person that they told me not to worry about it. Final adjustment to mtb seat hight was done on guestimation because the person could not care to go fetch measuring tape in office.

 

Had to send numerous mails to ask for my report. About 5 weeks later I received it.

 

Went to see Johan Rabie to setup my bikes again. Much more professional and huge difference in seat hight especially on mtb. Made huge diff in my climbing.

 

Out of principle I wont do ergofit again or advise anybody to use them

 

Hi Jaco,

 

Sorry you had a bad experience. I am not sure what the reasons were behind the rushed fitment or who did the fitment for you. As with all systems, the fitment is only as good as the person performing the fitment. These days we do certify all our fitters so that we are happy with the level of service that they provide, but we unfortunately can't control everything. At our centre here in Cape Town we like to commit to achieving an outcome where the client is happy, so they are always welcome to come back and make changes if necessary. From our experience, most stores, if they are serious about what they do would be willing to do this so maybe you should have contacted them post fitment to make sure everything was 100%.

 

Regards,

 

The ErgoFit team.

[flames]

Hi Guys

 

Without expecting you to give away any trade secrets, how is the optimal crank length calculated? With particular reference to a MTBing application.

 

I had an ErgoFit done some time ago and the the report stated that I required 175mm cranks. My inseam measurement is 80cm and I am 175cm tall.

 

I subsequently changed my cranks for 170mm and felt a difference. One of the primary differences was that I was able to slightly raise the saddle and thereby position on/in the bike. I felt more over the pedals if that makes sense.

 

I year ago I changed my frame to a smaller size which has made a big difference in terms of bike handling and overall comfort. I am comfortable with the 170mm however I am now in the market for a new crankset and was wondering whether to purchase the 175mm variety. Does the additional leverage of the longer cranks become meaningful?

 

Are there any physiological benefits to either the shorter or longer?

 

As an aside, the default MTB crank length seems to be 175mm. Why is this, or is the answer in fact that there is not that much difference and hence most individuals can operate efficeniently with the 175mm cranks?

 

Thanks

[ErgoFiT Bike Fitment]

Hi Guys

 

Without expecting you to give away any trade secrets, how is the optimal crank length calculated? With particular reference to a MTBing application.

 

I had an ErgoFit done some time ago and the the report stated that I required 175mm cranks. My inseam measurement is 80cm and I am 175cm tall.

 

I subsequently changed my cranks for 170mm and felt a difference. One of the primary differences was that I was able to slightly raise the saddle and thereby position on/in the bike. I felt more over the pedals if that makes sense.

 

I year ago I changed my frame to a smaller size which has made a big difference in terms of bike handling and overall comfort. I am comfortable with the 170mm however I am now in the market for a new crankset and was wondering whether to purchase the 175mm variety. Does the additional leverage of the longer cranks become meaningful?

 

Are there any physiological benefits to either the shorter or longer?

 

As an aside, the default MTB crank length seems to be 175mm. Why is this, or is the answer in fact that there is not that much difference and hence most individuals can operate efficeniently with the 175mm cranks?

 

Thanks

 

Hey flames,

 

That's a good question.

 

As it turns out you and I are both the same height and probably have similar leg lengths. Interestingly Shimano make a 172.5mm XTR mtb crank which I raced a season with. Having raced only 175mm cranks previously I gave the shorter length a try when they came on my 2011 race bike. I experienced more efficiency up smooth and steep climbs where getting the crank over the dead spots of the pedal stroke became important and also riding at high cadence. I did notice however that on technical climbs the torque distribution was not as even and I would lose traction faster. I expect this would be worse on a 170mm crank!

 

Having gone back to 175mm since then while riding Truvative cranks, I haven't noticed a drastic loss in climbing efficiency, and I would go as far to say that I much prefer the 175mm crank length over the 172.5. I've even chatted to top XC pro's who are vertically challenged and they are all on 175mm for that reason. I think the main reason is that a shorter crank makes it harder to lever the bike over obstacles while at a slow speed which is not a good thing when it comes to technical riding, which is why the cycling industry has chosen to go with these two crank length options only. The companies that offer 172.5mm are Shimano(although I'm not sure if it is imported into SA), Cannodale, and Rotor, and possibly one or two that I don't know about.

 

Having said that, ErgoFit predicts crank length off of the measured leg length and will only give a prediction in either 170mm or 175mm or 180mm crank lengths for mountain bikes.

 

So based off of my experience I don't think you would be any worse off on a 175mm crank.

 

Hope that helps!

[flames]

Thanks for the prompt reply. You seemed to have summed up the issues perfectly.

[ErgoFiT Bike Fitment]

Thanks for the prompt reply. You seemed to have summed up the issues perfectly.

 

No problem, hope you come right!

[ErgoFiT Bike Fitment]

Kevin Benkenstein MTB29 240414.pdf

Correct Bike Sizing:

 

Confused about what bike size to get? Traditional bike fitment methods use inseam length as a way to predict bike size. We at ErgoFit believe that there is a more accurate way to do this.

 

We are all biologically different and have different body proportions. It therefore makes logical sense to do a full body measurement to ascertain what is the correct size for the individual. Two people might have the same height but differing leg to body proportions, so they may be better off riding two different size bikes. Correct bike size is also not always a black and white as to what fits best. Speaking to an ErgoFiT consultant will also help you choose the correct size bike based on the type of riding you want to do and what feel you get out of the bike.

 

An ErgoFiT repost is attached which displays not only your optimal bike size, but also predicted parameters based of the dynamic assessment each individual receives.

 

We look forward to hearing from you!

 

The ErgoFiT Team

[Grondpad]

You dont maybe have a list of places one can go for a fitment in GP (Pretoria)?

[ErgoFiT Bike Fitment]

We recommend that you contact VeloLife in Pretoria. They have been certified by us.

 

012 361 9684

 

Regards,

 

The ErgoFiT team.

[Dazshell]

Check out Velolife Hillcrest!

I was going to suggest this too. They are in the old 4ever Cycles premises at Lilies Quarter in Hillcrest.

[ErgoFiT Bike Fitment]

I wish these services were available in Durban...

 

We do have certified ErgoFiT fitters at Velo Life Hillcrest. Give them a call!

[ErgoFiT Bike Fitment]

Good things need to be shared. This was from one of our clients last week who we did an ErgoMax assessment on as she had a leg length discrepancy from a motor cycle accident. We assessed where the discrepancy is, and corrected appropriately:

 

"Thank you so much for the fitment parameters as well as your precision in which you did my bike setup yesterday, the difference on just a 15km ride this morning is huge.

 

It feels as if someone is pushing me from behind, most likely due to me using the proper muscles (glutes) to cycle with instead of anything and everything else I could get summon to respond previously.

 

Secondly, I can immediately feel my weaker (left) leg being FORCED to contribute to the work load, whereas previously my right leg was forced to do everything!

 

I will be riding in the Bottelary Koppies this weekend, it will be a longer ride and some technical terrain so I’m very curious to see how different that is going to feel.

 

I feel like a kid with a new toy … BLOODY AWESOME I tell you!"