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Acera Shimano Cassette Sprocket CS-HG41

Q: Will this make a big improvement for climbing from using a 12-25 cassette that came on my Trek road bike?

This wouldfmake a great difference to the climbs, note you may need to change your rear deraileur to a medium or long cage from a short cage if fitted, the chain may also need to be longer (116 links).

Q: Fitted the cassettee no problem, but the top jockey on derailleur is rubbing against the largest 34t cog, will a longer cage on the derailleur stop th

The seller's advice is correct - there is a small screw called the "B" or "body angle" screw that sets the angle at which the derailleur sits. See section 5 in this article: https://www.parktool.com/blog/repair-help/rear-derailleur-adjustment

Q: I have a hg50 11-30, but this is a hg41, will this still fit?

You'll probably also have to change the length of the chain too. Unless it's a pretty new chain I'd change it at the same time as they are only about £12 for an HG40 one. You'll need a chain tool though (about £10), to change the length of the chain by pushing one of the pins out.

Q: are they separate cogs

Only the outer 2 cogs are separate the rest are riveted together and do not separate.Steve

Product ID: 48947044

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Details

Brand
SHIMANO
Colour
Silver
Material
Aluminium
Item weight
0.3 Kilograms
Mounting type
Clamp-On Mount

⚙️8-speed precision gearing

⛰️30T low sprocket for hill climbing

🛡️Nickel-plated corrosion resistance

Frequently Bought Together

Acera Shimano Cassette Sprocket CS-HG41

SHIMANO HG71 8/7/6-Speed Bicycle Chain W/SM-UG51 Quick Link - CN-HG71-I - ECNHG71T116Q

Park Tool Master Link Pliers MLP-1.2

Description

⚙️ Shift smarter, climb higher, ride longer — the ultimate cassette upgrade!

BUILT TO LAST - Nickel-plated finish resists corrosion, keeping your drivetrain pristine season after season.
CONQUER ANY HILL - Low 30T sprocket makes steep climbs effortless—leave others in the dust.
LIGHTWEIGHT YET DURABLE - Cut-away sprockets reduce weight without sacrificing strength or rigidity.
UNIVERSAL COMPATIBILITY - Designed for mountain and road bikes, perfect for the versatile cycling pro.
SEAMLESS 8 SPEED SHIFTING - Hyperglide tech ensures smooth, lightning-fast gear changes for every ride.

The Acera Shimano Cassette Sprocket CS-HG41 is a high-quality 8-speed cassette featuring Hyperglide sprockets with computer-designed tooth profiles for smooth shifting. Its low 30T sprocket optimizes hill climbing, while cut-away sprockets reduce weight without compromising strength. Finished with a nickel-plated coating, it offers excellent corrosion resistance, making it ideal for mountain and road cycling enthusiasts seeking reliable, durable performance.

Specifications

Manufacturer	Shimano
UPC	689228675636
Global Trade Identification Number	00689228675636, 04524667675631
Bike type	Mountain Bike
Brake type	Linear Pull
Color	Silver
Size	11-30
Style	Cassette
Frame material	alloy steel
Material composition	100
Height	2.5 inches
Item display length	6.1 inches
Weight	0.2 Kilograms
Item display width	6.2 inches
Lens material	Glass
Material type	Aluminium
Number of items	1
Outer material	Synthetic
Seasons	continuity 2013
Usage	Mountain, Road, Youth, cycling
Sport	Road Cycling
Wheel size	20 Centimetres
Included components	nothing
Batteries included?	No
Department	Cycling
Item model number	ECSHG418130
Product Dimensions	15.24 x 15.24 x 6.35 cm; 300 g
ASIN	B00518SHQA

Have a Question? See What Others Asked

Will this make a big improvement for climbing from using a 12-25 cassette that came on my Trek road bike?

Fitted the cassettee no problem, but the top jockey on derailleur is rubbing against the largest 34t cog, will a longer cage on the derailleur stop th

I have a hg50 11-30, but this is a hg41, will this still fit?

are they separate cogs

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