I can’t be the only one…….

[Webbo2]

Why are you looking for longer axles, your shoes and pedals look like most folks. Try them before you start looking for a problem that isn’t there.

 

[sevenfourate]

I meant gouged by the spindle as it's tightened, separate reason to moving the pedals out. TA always insisted washers should be fitted.

Most (All ?) Aluminium crank arms I’ve owned recently have had steel inserts (That presumably sit very slightly proud on the outside / pedal mating face) - so gouging can’t occur. I’ve not suffered any at least…….

 

[Ian H]

Most (All ?) Aluminium crank arms I’ve owned recently have had steel inserts (That presumably sit very slightly proud on the outside / pedal mating face) - so gouging can’t occur. I’ve not suffered any at least…….

That'll be your trendy, groupset type cranks.

 

[wafter]

If you go with spacers be very wary of all the cheapo ones with a hole through the middle for access to the hex in the pedal axle - leaves silly-thin walls at the undercut at the thread and are a death wish IMO.

This leave solid jobs which should be fine; however note that you'll need pedals with spanner flats on the axles. The best I've found IMO are JTEK jobs which can be had from SJS Cycles (free post if bought on ebay).

Personally I'd not get too hung up on the magnitude of changes to Q-factor - a few mm here and there is pissing into the wind if you want meaningful change; to give an idea the difference between a road crank with SPDs and an MTB crank with wide flats is about 50mm or 20% on the pedal centres.

Personally I can't ride anything with a narrow Q because it shafts my knees and hips, but everyone's optimum will be different and I appreciate your main motivator isn't comfort in this case..

 

[Happy_Days]

Thanks for the knowledge. The Ultegra with 4mm longer Axle is interesting.

Are they a Special ? Ie: The stock model isn’t 4mm longer. But there’s an option that is ?

They’re a stock model. I think (?) Shimano developed longer-axel pedals on Mark Cavendish’s request.

A fan because of extra clearance, more comfort, better mechanically / biologically or ?

I’m a big fan of longer-axel pedals, as the improved stance width works better for me biomechanically. A bike fit confirmed this.

I recommend trying them unless you have narrow hips—recognising that your body needs time to adjust (as usual for any change). Longer axel pedals make your road bike’s stance width slightly closer to that of a mountain bike’s.

Interestingly, long-axle Ulegra pedals increase the stance width about 1mm more than the longer Dura-Ace ones. Thus, if you find them on sale or money were no object, you could hedge your bets by getting long-axel Dura-Ace pedals.

NB: a good bike fitter would offer far better advice than me!

 

[Webbo2]

That’s hugely informative….Thankyou.

You couldn’t have been more spot-on if you tried 😉

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They are literally exactly the same width. The ROCKBROS must have a narrower body - as you say. Presuming the spindle is longer: like it appears visually.

From the crank to edge of both my Look pedals and Favero Powermeter pedals measures 8 cm. Your 105’s are 5mm wider than mine.