Shimano Ultegra R8000 HG800 11x34 road and mountain bike cassette - ICSHG8001111134

(74 reviews)

11-34 (CS-HG800)

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Speed compatibility

Ref : 1852970

€77.50

Price : €109.08

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Based on 74 reviews

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Shimano Ultegra R8000 HG800 11x34 road and mountain bike cassette - ICSHG8001111134

More details In stock

Shimano Ultegra R8000 HG800 11x34 road and mountain bike cassette - ICSHG8001111134

€77.50

Also available in store

Our opinion

A new 11-34 gear ratio for the Ultegra R8000 cassette, now even more versatile!

Sylvain C.

Mechanical expert

The Ultegra CS-HG800 11-34-Shimano s an 11-speed cassette designed for cyclists looking for a wide gear range without compromising on the quality of gear changes. Compatible with 11-speed Shimano road groupsets, it offers excellent versatility for tackling undulating routes, long climbs and endurance rides. Thanks to Hyperglide technology, gear changes remain smooth, fast and precise, even under load.

Particularly appreciated for its wide gear range, this cassette features a small 11-tooth sprocket for fast riding on the flat and a large 34-tooth sprocket to tackle the most demanding climbs. Its optimised design ensures an excellent balance between weight, stiffness and durability.

Key features

Genuine Ultegra 11-speed Shimano cassette
Wide gear range: 11–34 teeth
Hyperglide technology for smooth gear changes
Ideal for mountain biking and endurance riding
Compatible with road, gravel and certain 11-speed MTB set-ups
Excellent durability of the teeth
Lightweight construction with aluminium sprocket cage
Compatible with 11-speed Shimano/SRAM freehub bodies

Technical specifications

Part number: ICSHG8001111134
Model: CS-HG800
Number of speeds: 11
Tooth count: 11-13-15-17-19-21-23-25-27-30-34
Technology: Hyperglide (HG)
Materials: steel and aluminium
Use: road, endurance, gravel
Compatibility: 11-speed drivetrains Shimano

FAQ

Is this cassette compatible with a Shimano 105 R7000 groupset?

Yes, the CS-HG800 is fully compatible with Shimano 105, Ultegra and Dura-Ace mechanical or Di2 11-speed groupsets.

Can this cassette be used with a Shimano 105 R7000 GS rear derailleur?

Yes, the RD-R7000 GS derailleur is designed to accommodate a cassette with up to 34 teeth, making it an ideal combination.

Is this cassette suitable for mountain biking?

Yes, the 34-tooth sprocket significantly reduces the effort required on long climbs and steep gradients.

Is it compatible with a gravel bike?

Yes, many gravel bikes fitted with 11-speed Shimano r drivetrains use this cassette to benefit from its great versatility.

Which chain should I use with this cassette?

An 11-speed Shimano chain, such as the HG601, HG701 or HG901 models, is recommended to ensure optimal performance.

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9.8/10

Based on 74 reviews

Juan S.
Published Jun 15, 2026 at 09:05 pm (Order date: Jun 04, 2026)

5

Gear ratio that allows you to go everywhere. (Translated review)
Gilles G.
Published May 16, 2026 at 01:38 pm (Order date: May 03, 2026)

5

Not installed yet (Translated review)
Mathéo F.
Published May 02, 2026 at 06:12 pm (Order date: Apr 21, 2026)

5

Perfect (Translated review)
Stephane F.
Published Mar 30, 2026 at 09:06 pm (Order date: Mar 19, 2026)

5

Very good for the muddy mountain use of the East, almost 3 times cheaper than in stores. TTB (Translated review)
Lionel K.
Published Mar 09, 2026 at 08:03 pm (Order date: Feb 26, 2026)

5

Order received quickly. It's serious. (Translated review)
Jean paul h.
Published Jan 31, 2026 at 03:59 am (Order date: Jan 19, 2026)

5

Very good advice before ordering, the products are excellent (Translated review)
Gislain G.
Published Dec 28, 2025 at 02:39 pm (Order date: Nov 15, 2025)

5

Correct (Translated review)
David R.
Published Nov 09, 2025 at 06:55 pm (Order date: Oct 28, 2025)

5

Satisfied (Translated review)
Daniel F.
Published Aug 11, 2025 at 03:35 pm

4

not yet mounted (Translated review)
Jean Claude C.
Published Jun 01, 2025 at 02:38 pm

5

I took this cassette to have a 34-tooth. It was advised against mounting it with a Dura Ace 9100 derailleur due to incompatibility. I adjusted the limits, the derailleur's envelope (distance to the large sprocket, pulley). Mounted with a new Dura Ace chain, it's like velvet!! Finally a 34X34. No excessive chain tension, no noise. No issues. The derailleur being limited to 30 teeth, you shouldn't shift to the 50 (or more) X 34. That said, I've never had a problem with a 32. Couriers might want to abstain... Otherwise, this cassette is very well spaced. I recommend. (Translated review)