CLICK HERE to join our Email List and get 15% off your first order*
*Restrictions Apply. Click for details.
X
Signin to Your Account
Questions? Call our tri Specialists! 1-800-445-4790
Shimano Ultegra CS-HG800 11-Speed 11-34 Cassette

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

Add your own review
(37 customer reviews)
5 stars
4 stars
3 stars
2 stars
1 stars
(32)
(4)
(0)
(0)
(1)
(86%)
(11%)
(0%)
(0%)
(3%)

User submitted reviews

Review by nyc2pdx

Highly recommended for anyone with an 11S setup wanting more low end
by nyc2pdx
Cycling Enthusiast
Portland

Replaced an aging 11-32 cassette on my road/gravel bike with this - what a game changer. As someone who climbs ~2000ft/day during Summer/Fall I can tell you it makes a difference. Also lets you ride in the big ring a little bit longer before shifting down. Helps you achieve the higher cadence you couldn't before during steep inclines, when you have no gears left.

Reviewed 9/23/2024
Thank you for your feedback.

Review by WayneB

Great product. Works well if you do a lot of climbing.
by WayneB
Cycling Enthusiast
Northern California

Shimano Ultegra are quality products. I ride a road bike in an area where there are a lot of hills and do a lot of climbing. The 11/34 cassette works great for the areas I ride.

Reviewed 9/15/2024
Thank you for your feedback.

Review by Rick

Worked perfectly
by Rick
Vancouver, WA

I�m an older cyclist and needed a gear range that would make hills a little easier to negotiate. Installed the 11/34 cassette and have had no problems with shifting. Gear shifts are smooth. Had to make a slight adjustment with the rear derailleur is all.

Reviewed 7/4/2024
Thank you for your feedback.

Review by Moab Man

Going to the Rockies
by Moab Man
Cycling Enthusiast
Marin/Moab
1 of 1 customers found this review helpful.

Doing a tour of Utah and Colorado. Decided to get a lower gear for the altitude climbs. Fit perfectly on the Shimano wheel in place of an 11-32. Did not need to shorten the chain, just a turn or 2 on the B screw.

Reviewed 5/13/2024
Thank you for your feedback.

Review by Anonymous

Solid choice for the money
by Anonymous
Competitive Racer
Golden, Colorado
4 of 4 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
Thank you for your feedback.

Review by PNW Biker

SRAM 11sp compatible
by PNW Biker
Competitive Racer
Pacific NW

Sweet spot gearing for PNW Cyclocross (SRAM 11x32 is too high for hilly CX courses, and the 11x36 is too low for flat courses, but Shimano's 11x34 is just right). Fully companiable with SRAM Force1 1x11sp.

Make sure you use the supplied freehub spacer.

Reviewed 11/6/2023
Thank you for your feedback.

Review by Anonymous

What's not to like?
by Anonymous
Cycling Enthusiast
Mid-Atlantic
1 of 1 customers found this review helpful.

I've been using Ultegra cassettes ever since I broke two Dura Ace cassettes. They are quiet, shift great, and if you replace your chain when needed these cassettes last for well over 10,000 miles. The only reason I just bought a new one is that I'm looking for slightly lower gears for climbing as my girlfriend is the "Fastest girl in the world" and I'm trying to keep up with her on long steep climbs.

Reviewed 10/17/2023
Thank you for your feedback.

Review by Rainman737

Replaced an Ultegra 11-28
by Rainman737
Cycling Enthusiast
Camarillo, CA
1 of 1 customers found this review helpful.

Very high quality and great having the extra low gears for climbing. Be sure your derailleur can handle the larger cassette or buy a wolf tooth extension. You will also need a new chain. Very pleased with this purchase.

Reviewed 6/23/2023
Thank you for your feedback.

Review by BigMac1957

Works well with my 11 speed dura-ace derailleur
by BigMac1957
Cycling Enthusiast
Las Vegas, NV
2 of 2 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
Thank you for your feedback.

Review by AAcyclist

Solid smooth shifting
by AAcyclist
Cycling Enthusiast
Ann Arbor, MI
1 of 1 customers found this review helpful.

A rock solid, well made product. Shifts are smooth and quiet.

Reviewed 10/10/2023
Thank you for your feedback.

Review by BERoss

The cassette works great
by BERoss
Cycling Enthusiast
Annapolis, MD

The cassette was delivered without any issues. I gotten installed for an upcoming event that required some climbing elevation. I wanted to be ready. The cassette works great.

Reviewed 10/13/2023
Thank you for your feedback.

Review by Dave

Great climbing cassette
by Dave
S. C.

As alaways you get what you pay for, it's pricey but worth it for the quality and smooth shifting.

Reviewed 7/28/2023
Thank you for your feedback.

Review by rnfpdx

Great for gravel. Don't forget the spacer!
by rnfpdx
Cycling Enthusiast
Portland, OR
6 of 6 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
Thank you for your feedback.

Review by Andrew

Solid Shimano
by Andrew
FLA

Good enough for flat, great for steep climbs

Reviewed 1/13/2023
Thank you for your feedback.

Review by DutchTouch

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

Great cassette

Reviewed 1/13/2023
Thank you for your feedback.

Review by Anonymous

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
Thank you for your feedback.

Review by Little pebble

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
Thank you for your feedback.

Review by J brown

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
Thank you for your feedback.

Review by tiopablito

Shimano dropped the ball on this one
by tiopablito
Cycling Enthusiast
Georgia
4 of 10 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
Thank you for your feedback.

Review by Anonymous

Works
by Anonymous

No issues so far.

Reviewed 2/25/2022
Thank you for your feedback.
Next Page