Sidi wire sizing woes

by tonyhogg   March 3, 2014  

Tried 3 different sets of sidi wire cycling shoes, soooooo slack around the heel, even when heel adjustment is fully tightened they still slip loads, my heels squirm about loads. So annoying because there the best shoes I've ever tried, I'm a 42 in shimano, about a 7.5 uk sizing, tried the sidi wire in 43 toes felt perfect but heel slip, next tried 42.5 size far too tight toes were totally jammed up and I've got really slim narrow feet, (still had heel slipping issues)

Not sure what to try next, no local shops stock what I'm looking at, s-works, bont..,

12 user comments

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I tried to buy SiDI Genius 6.6 Carban Lite Vernice Shoes. I tried a few other SiDi models as well, but none would fit..

I got so fed up trying shoes in the end I went for these: SPECIALIZED COMP ROAD CYCLING SHOE.

Ok they may be chalk and cheese but these fit me so well. SiDi shoes are fantastic in almost every way, but for me the fit was way off, especially around the heel.

posted by wellcoordinated [102 posts]
3rd March 2014 - 20:47


Suede heel grips, a few pounds at any cobblers.

All Campag

posted by Flying Scot [676 posts]
3rd March 2014 - 21:00


If you're really in love with the Wires (not to mention the sadness at losing out on £250) you get get a silicone heel cup to fit into the sole, also available at your local cobbler's. Sometimes they're a bit thick so if that's too tight of a fit you could get a custom heel cup made by a shoe orthotic place (in the US you can get one through a physio referral but not sure how it's done in the UK).

Melancholy is incompatible with bicycling. ~James E. Starrs

movingtarget's picture

posted by movingtarget [136 posts]
3rd March 2014 - 22:01


Interesting thread as I have the same shoes, and find a very similar problem. I find my feet become very achy especially on the instep, probably because the shoes are too tight. So I loosen the shoes, and then I lose any strength in the shoe as my feet are a bit too loose. I do wonder whether they are right for me.

I am going to send back and go for a size up, but bear in mind that there is 3mm between every half size... And if you look at the sole on the half size, it's the same as the lesser size. My point being - these are handmade. No 43.5 is the same size as another 43.5.

It's tricky because they're £300 and I want them to fit like a glove. However, they fit worse than my £70 Shimanos. My bad, their bad, italian bad? Who knows.

posted by faz. [24 posts]
4th March 2014 - 18:39


It's like any shoe, cycling or not, they either fit or they don't irrespective of the make. For me sidi are 100% perfect I have 6 pairs going back over 20yrs and they are like slippers. I tried some bontranger for a change and I had the same issues you are having with sidi. Yes they are awesome to look at and the build quality is top notch, but if they don't fit perfectly don't keep them.

“Never underestimate the power of stupid people in large groups.”

― George Carlin

“Talk sense to a fool and he calls you foolish.”

― Euripides, Bacchae

Cyclist's picture

posted by Cyclist [226 posts]
4th March 2014 - 19:35


thanks for that unbiased advice actually because I was considering that they may just not be right. The worst thing I think about cycling shoes is it's useless even trying them on. Standing up in a shop is nothing like 8 hours in the saddle!
I ordered from Wiggle and they do 365 day returns (which is brilliant). They're new condition so will try a size up on the rollers and go from there.

I must admit I mainly went for them because of the stigma attached to them being 'the best', I didn't really try any others because I wanted them. Who else does a decent shoe with wire adjustment (because that is brilliant I think).

posted by faz. [24 posts]
4th March 2014 - 19:43


Do Wiggle accept returns of worn shoes? I think not.

posted by DeanF316 [105 posts]
4th March 2014 - 19:54


faz. wrote:
Who else does a decent shoe with wire adjustment (because that is brilliant I think).

The Wire's Tecno 3 tensioning buckle seems rather similar in mechanism to the Boa lacing system (reel and lace ratcheting for customizable fit) which is used by Lake and quite a few others.

Melancholy is incompatible with bicycling. ~James E. Starrs

movingtarget's picture

posted by movingtarget [136 posts]
4th March 2014 - 20:06


got some lake cx236c which are boa laced. nice and tight on the heel
but pinch the little toe area which is odd as the toe box is bigger than
my sidi's. my genius 6.6's are "slipper" like and have been
from new.

still on the 3rd switch-back of Bwlch !

posted by therevokid [768 posts]
4th March 2014 - 20:52


Exactly the Same issues as the OP, £70 shimano's fit much better its a joke on a shoe costing nearly £300, not true half sizes, they might fit some people's stupid dumpy wide feet or a tiny ballerina but not me (Mr Normal) rant over lol, I'll not be trying sidi brand ever again, waste of time and hassle.

posted by tonyhogg [62 posts]
4th March 2014 - 20:53


Wiggle accept returns on items that are in an unused condition, with original packaging.

Fortunately I qualify in both circumstances.

posted by faz. [24 posts]
6th March 2014 - 19:39


Try putting an insole arch support thing in your size 43 Sidi - tightening up the waist of the shoe holds you further back into the heel.

posted by Nick T [844 posts]
6th March 2014 - 20:11