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M:Part Carbon Fork Expander

Customer Reviews (5)

4.8 / 5| Write your review

£16.99

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Details

Headset tensioning top cap expander system for use in carbon composite steerer tubes
Expands inside the steerer tube
Causes no scoring or marking inside the steerer
Recommended for carbon composite steerer tubes
Anodised black finish with a lacquered carbon fibre top cap
Great looking and extremely functional

Product Reviews (5)

Questions & Answers (15) Q & A

Specification

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Product Reviews (5)

Overall Product Rating 4.8 / 5

Perfect for the job.

By Niven Chalmers

27 Feb 2018

5 / 5

I recommend this product

ConsNothing really.

ProsGood construction and a good price.

1 inch carbon fork steerer expanders are almost impossible to find these days, and this one is perfect for the job. Also for a good price and quick delivery from SJS. Thanks.

Perfect fit for Pesenti Fiandre

By Pavel Kosarev

29 Sep 2017

5 / 5

I recommend this product

Diameter 18.9 mm

Great Service From Sjs

By Anonymous

20 Jun 2017

5 / 5

I recommend this product

ProsFast shipping. Great piece of kit

It's not easy to find a 1" carbon fork expander. The M-part one is just great, with a perfect finish all round and a cool carbon ahead cap with minimalist logo.
Overseas shipping from SJS was fast and hassle free.
Thanks.

Direi Che Fa Quello Che Deve Fare

By paolo

04 Mar 2017

5 / 5

I recommend this product

Il prodotto è della misura giusta per una forcella da 1 pollice e fa quello che promette. L'expander mi sembra di buona qualità, anche se il tappo di chiusura è diverso rispetto a quello raffigurato in figura

Good Quality Product At A Reasonable Price

By Nick Thorpe

24 Jun 2016

4 / 5

I recommend this product

ConsNone

ProsGood quality product, will fit a range of different sizes of steerer

Needed a replacement to fit a 22 mm internal diameter carbon steerer. This was very easy to install and looks good too.

Questions & Answers (15)

What is the largest I'd the 1 1/8 will fit. Mine is 23.9mm.

By Be

23 Nov 2022

SJS Customer Service:

Hi
Thank you for your enquiry, unfortunately it will only fit upto 22.2mm
Regards. WD 24/11/22

Hi, will the 1 inch carbon fork expander fit a carbon for that is 19.8mm internal diameter?

By Hugo Kensdale

10 Aug 2022

SJS Customer Service:

This should fit any Carbon fork with any 1-inch external diameter, the ID is less of an issue as it is size adjustable to account for various wall thicknesses.

JK 11.08.22

Can I use the 1 inch version with a Colnago Force carbon 1 inch fork?

By Robert Hallman

07 Jul 2022

Based on your previous replies I purchased your 1 inch version expander to use with a Colnago Force carbon 1 inch fork. It doesnt fit.

In your replies to similar questions you have stated different diameter of the expander. 18.8mm and 19.8mm.

If it was 18.8mm it would fit a Colnago 1 inch fork but it does not.

SJS Customer Service:

Uncompressed, the OD measures 19.8mm,

JK 08.07.22

What is the total length of this item inside the steerer? Ie what clamping length does it support?

By Ian

13 Apr 2022

SJS Customer Service:

Thank you for your enquiry, it is around 35mm total length that would be inside the steerer.

WD 14/04/22

i have a 1 & 1/8 fork with internal diameter 22mm - which product should I buy? the 1 inch or 1 1/8?

By John Donnelly

04 May 2021

SJS Customer Service:

Thank you for your enquiry, the 1 1/8 will be correct

WD 05/05/21

Can I use this with Columbus Muscle 1" Forks

By ubrubr

21 Feb 2021

Inner diameter of steer is 19.2 mm.

Thanks

SJS Customer Service:

Thank you for your enquiry, yes will fit fine it measures 18.8mm

WD 22/02/21

Can I use this with Colnago C40 1 inch fork? steerer tube inner diameter is about 3/4 inch or 19mm

By Chun Tung, LAI

02 Jan 2020

SJS Customer Service:

As long as you select the 1" option, yes this should be good.

Thanks - 03/01/20

Hi, the 1inch version fit with a inner tube 19.5mm? Thanks. What is the minimum diameter?

By Mauro

20 Jan 2019

SJS Customer Service:

19.8 mm
Measured diameter of this fork expander
Thanks
2019/01/21

MPart Carbon Expander

By Richard

25 Jul 2018

Hi I need a expander for my 1”Mizuno 700c Carbon Steerer forks the internal diameter is 18mm would this work or can you advise an alternative..
Cheers Richard

SJS Customer Service:

Hi there,

Unfortunately the smallest that this will fit is 20mm, and we do not sell anything else that would be suitable im afraid.

Thanks.

Will it fit a stem that has its own top cap?

By Marc Tardif

10 Apr 2018

I have a Merida Warp TT bike and it has a 1 in steerer tube fork (20.5 mm approx inner diameter) and a special stem with its own steerer tube top cap. Does this M:Part expander use a special cap with internal threads (like the FSA model) or would any regular top cap and bolt work? I would simply use the Merida cap and bolt. A picture of the expander with the top cap removed would greatly help.

SJS Customer Service:

Hi there,

This uses a standard top cap/nut not an internally threaded one.

Thanks

Hi, will this a fork with an internal diameter of 20mm?

By Nate

03 Feb 2018

SJS Customer Service:

Hi there,

The smaller option will fit 25.4mm +- probably only a few 0.1mms!

Thanks

What is the weight of this expander? Thankyou

By roger

07 Sep 2017

SJS Customer Service:

Hi,

The 1 1/8" expander weighs 40grams.

Thanks.

hi can you tell me what the smallest id this will fit cheers .

By Anonymous

04 Aug 2017

SJS Customer Service:

Hi, the 1 inch is 20mm, the 1 1/8 inch is 22mm. Thanks

Hi, I Have A 1 Inch Carbon Fork, But The Inside Diameter Is 20.0Mm. Will This Expander Fit?

By Bartek

31 May 2016

SJS Customer Service:

Hi,

This expander will be suitable for use with your forks.

Thanks.

What Internal Diameter?

By Anonymous

22 Jun 2014

my fork is a 1 1/8 inch, but has an internal diameter of 22mm. Will this fit?

SJS Customer Service:

Hi,

Yes, this will fit your forks.

Thanks.