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Fit Bike Shenanigans (or Am I Doing it Wrong?)
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I've been using a fit bike for many years - a Retul Muve and now a Guru DFU. I get fits sent to me from time to time and also see other fits that shops post, and TWICE now I've seen this exact setup in different shops - 30 mm spacers and an adjustable stem pitched way, way, way up. That seems, to me, like a completely incorrect use of a fit bike. But I want to try and be diplomatic, so can someone explain why two shops (with no interaction with each other) would do this on their fit bike?



Trent Nix
Tri Shop - Plano, Texas
http://www.trishop.com
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F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter
Last edited by: trentnix: Nov 18, 17 6:13
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [trentnix] [ In reply to ]
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Wow, I have never seen it used on a fit bike like this but it do makes you wonder if they set up their fit bike like this how they set up their sold bikes. We do have a shop here in the netherlands that send people out the door with 8 or 9 cm towers of spacers under the stem. On road or tri. They do this on their housebrand bikes and tell the customers that the fork is built for this purpose.
I have seen in mutiple occasions.

But, yes, why would do it on your fit bike. I can’t really think of any reason

We should continue like we do ;-)

Best regards

Jeroen

Owner at TRIPRO, The Netherlands
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [trentnix] [ In reply to ]
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Trent when I am using the Retul Muve SL with the Angul fit stem i will vary the spacers depending on the fit the client is after. After I have completed a fit I will Zin the fit bike and look at whatever the handlebar stack or pad stack is at and then make the adjustments on the clients bike. Same thing as to what angle the fit stem is at this can be adjusted using spacers on the clients bike or by changing the stem angle also.

Happy fitting

Robert Driskell
Certified Master BodyGeometry Fit Technician since 2009
Bayou Bicycles New Orleans,LA
(Retailer of Specialized Bicycles)
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [Robert Driskell] [ In reply to ]
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When you say “what kind of fit the client is after” what do you mean? For your average fit (Triathlon), how many spacers and what stem pitch do you use?

Trent Nix
Tri Shop - Plano, Texas
http://www.trishop.com
Facebook | Twitter | Instagram | Youtube
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [trentnix] [ In reply to ]
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When I refer to what kind of fit, I am talking about cycling discipline. As to an average amount of spacers that too is not something of reference as everybody is different with their body and ability. I use the Muve for Tri,TT,Road, Mountain, Cross, and fitness bike fits. But i usually leave a 10mm spacer on my Muve when I fit . Fit bikes are great especially when doing an athlete that does not yet have a bike.

Robert Driskell
Certified Master BodyGeometry Fit Technician since 2009
Bayou Bicycles New Orleans,LA
(Retailer of Specialized Bicycles)
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [tri-run] [ In reply to ]
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I try to always set the stem slammed down and then use pad or bar spacers to achieve the desired pad stack. Again this all depends on what is going on with the riders body.

Robert Driskell
Certified Master BodyGeometry Fit Technician since 2009
Bayou Bicycles New Orleans,LA
(Retailer of Specialized Bicycles)
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [Robert Driskell] [ In reply to ]
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Robert Driskell wrote:
Trent when I am using the Retul Muve SL with the Angul fit stem i will vary the spacers depending on the fit the client is after. After I have completed a fit I will Zin the fit bike and look at whatever the handlebar stack or pad stack is at and then make the adjustments on the clients bike. Same thing as to what angle the fit stem is at this can be adjusted using spacers on the clients bike or by changing the stem angle also.

Happy fitting

But i think there is a difference in what you are referring to of using and the set up of the fitbike in the picture Trent put up. That pic shows something like 30 -35 mm od spacers with an pretty high angled up stem. That really makes no sense i think.

Jeroen

Owner at TRIPRO, The Netherlands
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [tri-run] [ In reply to ]
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Makes a lot of sense if the clients body dictates the use of these spacers. The great thing about fit bikes is the ability to adapt the tool to whatever is presented

Robert Driskell
Certified Master BodyGeometry Fit Technician since 2009
Bayou Bicycles New Orleans,LA
(Retailer of Specialized Bicycles)
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [Robert Driskell] [ In reply to ]
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But why just not turn the fit bike to a higher stack position since it would not be wise to set up a real bike with 40 mm of spacers and a very angled up stem? At least in case of the pic of trent there is more then enough room on that muve to just stack up the front of the bike instead of using that amount of spacers and that angled stem.

Jeroen

Owner at TRIPRO, The Netherlands
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [trentnix] [ In reply to ]
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I've found myself doing this is when I have had a customer looking to be fit to an existing bike that needs way more stack than is natively reasonable. I mock up the shenanigans necessary to make it work on the fit bike. Has proven a worthwhile exercise to demonstrate to the client "we can make it work but..."


Coaching and bike fit - http://source-e.net/ Cyclocross blog - https://crosssports.net/
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [fredly] [ In reply to ]
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fredly wrote:
I've found myself doing this is when I have had a customer looking to be fit to an existing bike that needs way more stack than is natively reasonable. I mock up the shenanigans necessary to make it work on the fit bike. Has proven a worthwhile exercise to demonstrate to the client "we can make it work but..."
You're braver than me, because that's expressly why we do fits on their existing bike. Doing the fit and then transferring the coordinates is a road fraught with peril and disappointment. When we do it using the customer's bike, we're guaranteed to avoid exceeding the limitations of their equipment.

Trent Nix
Tri Shop - Plano, Texas
http://www.trishop.com
Facebook | Twitter | Instagram | Youtube
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [tri-run] [ In reply to ]
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tri-run wrote:
But why just not turn the fit bike to a higher stack position since it would not be wise to set up a real bike with 40 mm of spacers and a very angled up stem? At least in case of the pic of trent there is more then enough room on that muve to just stack up the front of the bike instead of using that amount of spacers and that angled stem.

Jeroen
Bingo.

Trent Nix
Tri Shop - Plano, Texas
http://www.trishop.com
Facebook | Twitter | Instagram | Youtube
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [trentnix] [ In reply to ]
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trentnix wrote:
tri-run wrote:
But why just not turn the fit bike to a higher stack position since it would not be wise to set up a real bike with 40 mm of spacers and a very angled up stem? At least in case of the pic of trent there is more then enough room on that muve to just stack up the front of the bike instead of using that amount of spacers and that angled stem.

Jeroen
Bingo.

seems like spacers will be a part of every fit solution out of that particular fitter. Which is backwards... find pad X and Y and then compute the frame needed for that fit assuming a slammed stem

Eric Reid
AeroFit
Chapel Hill, NC
Aerodynamic Optimized Bike Fitting, Retul Pre-Purchase Bike Fitting, Triathlon Coaching, Nutrition
Ask me: Scody Optimized Speed Suits | CeramicSpeed Oversized Pulley Systems | HUUB Skinsuits and Wetsuits | Ventum Bicycles and Frames
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [ericMPro] [ In reply to ]
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Agreed. If you're building in spacers but using your judgement and/or math to remove them, the same can be done to put them back in.

Only logic I can see is that they used frame geometry only and got burned, selling bikes that were too big once or twice. And this is how they make sure that never happens again.

Trent Nix
Tri Shop - Plano, Texas
http://www.trishop.com
Facebook | Twitter | Instagram | Youtube
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [trentnix] [ In reply to ]
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trentnix wrote:
Agreed. If you're building in spacers but using your judgement and/or math to remove them, the same can be done to put them back in.

Only logic I can see is that they used frame geometry only and got burned, selling bikes that were too big once or twice. And this is how they make sure that never happens again.

haha... I haven't had a client with a too-big bike ever!

Eric Reid
AeroFit
Chapel Hill, NC
Aerodynamic Optimized Bike Fitting, Retul Pre-Purchase Bike Fitting, Triathlon Coaching, Nutrition
Ask me: Scody Optimized Speed Suits | CeramicSpeed Oversized Pulley Systems | HUUB Skinsuits and Wetsuits | Ventum Bicycles and Frames
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Re: Fit Bike Shenanigans (or Am I Doing it Wrong?) [trentnix] [ In reply to ]
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The point to having a modern fit bike is to eliminate the need to play with stems and spacers. All you need is to find the X/Y’s, then use math to calculate the stem/spacers needed to accommodate that with different frames.

Doug Baumgarten
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