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Critique my bike fit
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keen to get some perspective on my bike fit. I’m usually in the top 30% of the field but have been experiencing some lower back / upper glute discomfort.

Thanks!

https://s3-ap-southeast-2.amazonaws.com/...8wupst6gvi-large.jpg
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Re: Critique my bike fit [JB78] [ In reply to ]
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Seats too high...
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Re: Critique my bike fit [Shambolic] [ In reply to ]
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Agree too high
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Re: Critique my bike fit [JB78] [ In reply to ]
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Seat needs to come down by a good amount. Knee angle is about 155. Aim for somewhere between 140-150 degrees but since you already have issues I'll try the lower end of that range. So drop your seat about 2cm and go from there.



JB78 wrote:
keen to get some perspective on my bike fit. I’m usually in the top 30% of the field but have been experiencing some lower back / upper glute discomfort.

Thanks!

https://s3-ap-southeast-2.amazonaws.com/...8wupst6gvi-large.jpg

What's your CdA?
Last edited by: trailerhouse: Dec 10, 18 2:35
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Re: Critique my bike fit [trailerhouse] [ In reply to ]
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Agreed - seat needs to drop 15-20 mm or so. And the cockpit should drop about the same and maybe 5 mm more. That's going to get you off the High-V.

Trent Nix
Tri Shop - Plano, Texas
http://www.trishop.com
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Re: Critique my bike fit [trentnix] [ In reply to ]
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trentnix wrote:
Agreed - seat needs to drop 15-20 mm or so. And the cockpit should drop about the same and maybe 5 mm more. That's going to get you off the High-V.

On top of what these guys are saying getting a seat that let's you roll your hips more would take some of the stress off the low back (not so much arching).
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Re: Critique my bike fit [trentnix] [ In reply to ]
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aren't we overlooking the obvious that he's on a bike that's too small??

trentnix wrote:
Agreed - seat needs to drop 15-20 mm or so. And the cockpit should drop about the same and maybe 5 mm more. That's going to get you off the High-V.

Eric Reid
AeroFit | Instagram Portfolio
Chapel Hill, NC
Aerodynamic Optimized Bike Fitting, Retul Pre-Purchase Bike Fitting, USAT Level 1 Triathlon Coaching, Nutrition
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Re: Critique my bike fit [JB78] [ In reply to ]
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lots of red flags here... you really need to start over. I'd see a good fitter.

Your bike is probably one size too small, especially when your saddle comes down and you lose the high-V mount.

What saddle are you on?

Can you lower your head and ride comfortably?

Eric Reid
AeroFit | Instagram Portfolio
Chapel Hill, NC
Aerodynamic Optimized Bike Fitting, Retul Pre-Purchase Bike Fitting, USAT Level 1 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: Critique my bike fit [ericMPro] [ In reply to ]
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It's a size smaller than I'd prefer, but not too small. It can work.

Trent Nix
Tri Shop - Plano, Texas
http://www.trishop.com
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Re: Critique my bike fit [trailerhouse] [ In reply to ]
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Thanks this is useful!
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Re: Critique my bike fit [Fishbum] [ In reply to ]
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Fishbum wrote:
trentnix wrote:
Agreed - seat needs to drop 15-20 mm or so. And the cockpit should drop about the same and maybe 5 mm more. That's going to get you off the High-V.

On top of what these guys are saying getting a seat that let's you roll your hips more would take some of the stress off the low back (not so much arching).

Thanks! I have a 10mm tiled spacer under the arm cups I could remove.
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Re: Critique my bike fit [ericMPro] [ In reply to ]
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ericMPro wrote:
lots of red flags here... you really need to start over. I'd see a good fitter.

Your bike is probably one size too small, especially when your saddle comes down and you lose the high-V mount.

What saddle are you on?

Can you lower your head and ride comfortably?

Thanks! Saddle is the ISM Prologue... slammed as far forward as possible.

Yeah I could ‘turtleneck’ more if I didn’t have the nagging pain in my RHS lower back.
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Re: Critique my bike fit [JB78] [ In reply to ]
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JB78 wrote:
ericMPro wrote:
lots of red flags here... you really need to start over. I'd see a good fitter.

Your bike is probably one size too small, especially when your saddle comes down and you lose the high-V mount.

What saddle are you on?

Can you lower your head and ride comfortably?


Thanks! Saddle is the ISM Prologue... slammed as far forward as possible.

Yeah I could ‘turtleneck’ more if I didn’t have the nagging pain in my RHS lower back.

if that's the case you're on the wrong saddle, or sitting wrongly on the right one. Anyway ,I'd really just start over... your position is so tweaked that you're not inside the box anymore where small incremental changes and advice would be helpful.

Eric Reid
AeroFit | Instagram Portfolio
Chapel Hill, NC
Aerodynamic Optimized Bike Fitting, Retul Pre-Purchase Bike Fitting, USAT Level 1 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: Critique my bike fit [ericMPro] [ In reply to ]
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ericMPro wrote:
aren't we overlooking the obvious that he's on a bike that's too small??

trentnix wrote:
Agreed - seat needs to drop 15-20 mm or so. And the cockpit should drop about the same and maybe 5 mm more. That's going to get you off the High-V.

Thanks. I’m 6”3’ and a 56cm frame.

I’ve previously had a 58cm P2C but felt way to stretched.

Even with this frame I have to slam to seat as far forward as possible to get remotely comfortable.

What do you observe as the indicators that the frame is too small?

Cheers

JB
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Re: Critique my bike fit [JB78] [ In reply to ]
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the massive amount of spacers


JB78 wrote:
ericMPro wrote:
aren't we overlooking the obvious that he's on a bike that's too small??

trentnix wrote:
Agreed - seat needs to drop 15-20 mm or so. And the cockpit should drop about the same and maybe 5 mm more. That's going to get you off the High-V.


Thanks. I’m 6”3’ and a 56cm frame.

I’ve previously had a 58cm P2C but felt way to stretched.

Even with this frame I have to slam to seat as far forward as possible to get remotely comfortable.

What do you observe as the indicators that the frame is too small?

Cheers

JB

Eric Reid
AeroFit | Instagram Portfolio
Chapel Hill, NC
Aerodynamic Optimized Bike Fitting, Retul Pre-Purchase Bike Fitting, USAT Level 1 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: Critique my bike fit [JB78] [ In reply to ]
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JB78 wrote:
ericMPro wrote:
aren't we overlooking the obvious that he's on a bike that's too small??

trentnix wrote:
Agreed - seat needs to drop 15-20 mm or so. And the cockpit should drop about the same and maybe 5 mm more. That's going to get you off the High-V.


Thanks. I’m 6”3’ and a 56cm frame.

I’ve previously had a 58cm P2C but felt way to stretched.

Even with this frame I have to slam to seat as far forward as possible to get remotely comfortable.

What do you observe as the indicators that the frame is too small?

Cheers

JB
The P2C and P5 have dissimilar geometries. It's why buying by size is, almost certainly, a good way to buy the wrong size. In a perfect world, you get a good fit and then buy based on fit coordinates.

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 - Fit Portfolio
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Re: Critique my bike fit [JB78] [ In reply to ]
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Before you go nuts with changes, it would be wise to submit for review a video on a trainer rather than rely on a single photo. Hopefully you've seen enough of these threads to know the drill on video setup.
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Re: Critique my bike fit [JB78] [ In reply to ]
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Just a couple points before you sell your frame for a bigger one...

I would just drop the saddle first without changing anything else and see how that feels. That should remove some pressure on the lower back immediately. If you feel the need to drop the front end -
  • You said you had 10mm of spacer under the arm pads which you could remove.
  • It also looks like to have a top cap / spacer under the stem - remove this, the Aduro bar does not require a top cap. That will give you a few mm more drop (and remove those visually annoying gaps between the stem and top tube and between the beard and brake covers! In fact do this anyway...).

  • Last edited by: SAvan: Dec 11, 18 6:15
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    Re: Critique my bike fit [JB78] [ In reply to ]
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    Nothing much to add, but looks like a nice day on Beach Road...
    Was the swim or T1 a bit long? Lot of +30 min swims!
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