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Shimano Ultegra CS-HG800 11-Speed 11-34 Cassette

ShimanoUltegra CS-HG800 11-Speed 11-34 Cassette(Return to Product Page)

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(27 customer reviews)
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Solid choice for the money
by Anonymous
Competitive Racer
Golden, Colorado
1 of 1 customers found this review helpful.

Crisp, clean shifting cassette for those who don't feel like spending the extra cash for the Dura Ace. The larger 34 tooth gearing works perfectly in the Colorado mountains or on the steep gravel roads.

Reviewed 2/17/2023
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Works well with my 11 speed dura-ace derailleur
by BigMac1957
Cycling Enthusiast
Las Vegas, NV
1 of 1 customers found this review helpful.

I bought this to use when I do long very steep climbs in place of my usual 11-30 cassette. Its nice to have 2 easier gears on those climbs.

Reviewed 10/28/2022
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Solid Shimano
by Andrew
FLA

Good enough for flat, great for steep climbs

Reviewed 1/13/2023
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Shimano Ultegra CS-HG800 11-Speed 11-34 Cassette
by DutchTouch

Great cassette

Reviewed 1/13/2023
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Gateway cassette
by Little pebble
Cycling Enthusiast
Carlton, Oregon

11-34 ultegra cassette is what allows this older cyclist to climb�5000 miles on my current ultegra

Reviewed 10/21/2022
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Great for gravel. Don't forget the spacer!
by rnfpdx
Cycling Enthusiast
Portland, OR
1 of 1 customers found this review helpful.

Replaced an 11-32 on my gravel bike. Nice to have the extra teeth for a little more relief when the going gets steep. NOTE that even though this is branded as an Ultegra cassette, it is actually spec'd for mountain bikes. Meaning - if you're using a road hubset you need to install the included spacer on the freehub before you install the cassette.

Reviewed 11/4/2021
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Needed that extra cog
by Anonymous
Cycling Enthusiast

There are steep hills in the Islands , so I opted for this cassette... Im not too thrilled with the spacing of the gears, but it performs as well as can be expected..

Reviewed 12/6/2020
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Works
by Anonymous

No issues so far.

Reviewed 2/25/2022
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Great cassette
by Anonymous
Cycling Enthusiast
LA

I'm glad they had this in stock. Ultegra cassettes make that pro noise!

Reviewed 11/11/2021
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This is great! Allowed me to use my old Chris King wheels with an 11 speed drivetrain
by Anonymous
Cycling Enthusiast

With the advent of 11 speed road groups, I wanted to use my old 10 speed Chris King wheelset.

This let me use this wheelset for at least a few more years!

Reviewed 11/4/2021
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Gravel Cassette
by J brown
Idaho
1 of 2 customers found this review helpful.

Used this on a second set of wheels, GRX components, worked flawlessly.

Reviewed 1/31/2020
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Shimano dropped the ball on this one
by tiopablito
Cycling Enthusiast
Georgia
4 of 9 customers found this review helpful.

Largest spider is bad design. Third from largest cog is too close to second from largest and fourth cog also is a little wonky. Several reviews I read before buying this warned me, but I reckoned Shimano would have corrected the problem. Nope (. Going back to the 105 cassette until their gravelCX groupset is available.

Reviewed 5/28/2019
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The casssette for the rest of us
by Anonymous
Cycling Enthusiast
3 of 3 customers found this review helpful.

There is no shame in getting the gears that work FOR YOU! My setup Praxis Zayante 4832, Shimano Ultegra FD-6800, and Ultegra RD-6800-GS (long cage). The HG800 11-34 was a simple drop-in replacement for a CS-R8000 11-32. I tightened the B-Screw a 12 turn but it really wasn't that necessary. I did not even have to change the chain. The derailleurs have no problems shifting small-small to big-big and every combination in between.

Reviewed 3/25/2019
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Low gears for steep hills
by tfolkner
Cycling Enthusiast
Cupertino, CA
15 of 15 customers found this review helpful.

I live near the Santa Cruz mountains in California and my bike club rides frequently up very steep hills (15-20% grades). I ride 10k miles with 1 million feet of climbing annually, but past racing age. I use this 11-34 gear with Ultegra 5034 cranks resulting in a 34-34 low gear. This lets you climb the steepest hills while spinning a decent RPM and not straining your knees. Also helps on long hard rides near the end to climb hills when you're tired. If you are a 125 lb racer you don't want this cassette. It's only drawback is that to achieve the wide range there are some gaps in the gearing. I miss the 12 tooth sprocket.

Reviewed 11/19/2018
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Perfect addition to help with hills
by DonWA
Cycling Enthusiast
Palatine, IL
5 of 5 customers found this review helpful.

I bought this cassette to help with hills as I am riding the Copper Triangle in Colorado this year. Wound up liking it so much I bought more of them to upgrade all my bikes. Fully compatible with Ultegra 8000 series derailleurs. With this cassette I could climb Everest .

Reviewed 7/15/2018
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Great Product
by DonWA
Cycling Enthusiast
Palatine, IL
6 of 7 customers found this review helpful.

I was already running the Shimano 6800 11-32 cassette but anything I can do to help save my knees is a plus. You wouldn't think 2 extra teeth is a big deal but it is noticeable. When Shimano introduced this cassette and made it compatible with my current shifters I went for it. You will also need the 8000 series derailleur and a new chain to make it all work but when you are finished you will have a bike that can climb Everest without having to get off and walk.

Reviewed 7/10/2018
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Ultegra
by Andy
Florids

Love the replacement cassette. Shimano is always high quality

Reviewed 12/22/2020
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Billy goat cassette works great!
by Steve R
Cycling Enthusiast
Cincinnati OH
8 of 8 customers found this review helpful.

Used this instead of my old 1132 cassette this year at DK200 to make the 11,000 feet of climbing a little easier and it did the trick nicely. Worked great with an Ultegra chain, compact crank and a GS rear derailleur Di2 set up. There was plenty of take up to keep the chain taught on the rough stuff cross chained and enough clearance on the 34 tooth cog with the B screw tightened up a bit.

Reviewed 7/6/2018
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Great product.
by Anonymous
Cycling Enthusiast

Perfect fit. Great quality.

Reviewed 12/18/2020
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A few extra teeth allows for a spin instead of grind.
by Anonymous
Cycling Enthusiast
Winters CA
5 of 5 customers found this review helpful.

This cassette fits on medium cage rear derailleurs. The gear spread is perfect so you are able to adapt your gearing to cadence when climbing.

Reviewed 6/14/2018
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