8 and 9-speed derailleurs have the same rear shift ratio but only when both models are made either by Shimano or SRAM. In consequence, a 9-speed derailleur can work just fine with an 8-speed cassette produced by the same brand. If the bicycle uses index shifting, the shifter will have to be designed for 8 speeds too.
Are 8 and 9 speed cassettes the same width?
Same width, different spacing
Both 8-speed and 9-speed have the same freehub width, while the 7-speed is a bit narrower. The spacing of gears of 8-speed and 9-speed differ. You need a spacer behind a 7-speed cassette for it to fit on an 8-speed or 9-speed freehub.
Can I use a 9 speed cassette on a 8 speed hub?
8-speed Campagnolo cassettes will not fit on newer "9-speed" and "10-speed" hubs. 9- and 10-speed Campagnolo cassettes will not fit on 8-speed hubs.
Are Shimano 8 and 9 speed compatibility?
Most 8- and 9-speed Shimano mountain bike and road kit is inter-compatible because they both use the same cable pull ratio. This means that you can use an 8 -or 9-speed mountain bike derailleur with road shifters or vice versa.
Can I use a 9 speed crankset with a 8 speed cassette?
Yes, there are no complications with running a 9 speed crankset on an 8 speed drivetrain.
44 related questions foundWill an 8 speed chain work on a 9 speed bike?
9sp gears have less space between them, so an 8sp chain would rub or jump, which is noisy and/or dangerous. Conversely, a slightly thinner 9sp chain will fit on the wider spaced sprockets of an 8sp bike and not rub. It is only slightly thinner, so it won't cause trouble.
Will a 10 speed chain work on a 8 speed cassette?
A 10 speed chain should work on an 8-speed drivetrain. if you want 10 speeds, you will need a 10 speed-specific chain, cassette, derailleur and shifter (and a new cable while you're at it).
Are bicycle cassettes interchangeable?
In some cases, it is possible to run a cassette from a different brand than the rest of your drivetrain. SRAM and Shimano cassettes, on either road or mountain bike, are interchangeable with each other as the spacing is the same between the sprockets.
Are all Shimano 9 speed shifters compatible?
Shimano shifters, whether for 6, 7, 8, or 9 speeds are compatible with all the Shimano RDs for 6 to 9 speeds, and with Shimano 10 speed road RDs (not with 10 speed MTB RDs).
What is the difference between 8 and 9 speed chain?
Former Bike Wrench
7, 8, and 9 speed chains have the same inner width, but 9 speed chains have thinner outer plates for a thinner overall chain. So while a 9 speed chain works fine on a 7 or 8 speed drivetrain, it will be a weaker chain that tends to "stretch" faster.
Are all 8 speed cassettes the same?
SRAM and Shimano are the same spacing and fit the same freehub, all 8 speed chains are compatible.
Can 9 speed cassette change to 10?
You can put a new 10 or 11 speed cassette on any of the older 9 speed hubs. So, regardless of brand, feel free to buy your wheels a nicely upgraded new steed.
Do all cassettes fit all hubs?
Most cassette hubs are compatible with Shimano cassette cogs. SRAM cassettes and most Miche, IRD and SunRace cassettes use the same inter-sprocket spacing as Shimano, but at least some SRAM 10-speed cassettes do not fit aluminum-body Dura-Ace hubs.
Are Freehubs interchangeable?
freehub standard accepts only XD cassettes. There are 10, 11 and 12 speed cassette versions (same XD freehub body). Many wheel and hub manufacturers make XD compatible freehub bodies that can be screwed onto the hub instead of the old Shimano compatible freehub.
Are all 9 speed chains the same?
Chain width is about 6.7 mm.
Front chainrings are less sensitive to the thickness of chain used. Otherwise, all the 9 speed chains will work well, regardless of the manufacturer: Campagnolo, SRAM and Shimano.
Can I use a 7 speed derailleur on an 8 speed cassette?
8 speed shifter and cassette, 7 speed derailleur? You'll be fine. There's no "probably" about it. 6-, 7- and 8-speed gear is all cross-compatible in terms of chain width.
Can I use 7 speed shifter with 8 speed cassette?
The takeaway is that you can use an 8sp cassette with a 7sp shifter and expect it to index flawlessly. You can also space a 7sp cassette onto an 8sp hub by putting a 12t or 13t sprocket from an old cassette behind it, so long as the rivets don't interfere.
Can I use a 9 speed shifter with a 7 speed cassette?
If you used a 7 speed cassette, with a 9 speed shifter and 7 speed derailleur you would not pull enough cable and the shifts will get mangled. If you are currently on 7 Speeds, this means you have a 7 speed wheel that will most likely NOT take a 9 speed cassette.
How do I know what kind of cassette to get for my bike?
How to Tell What Bike Cassette You Have. Cassettes are defined by their sprocket number (number of teeth). A cassette generally has two numbers. The smallest is the teeth count on the smallest sprocket/cog, while the second number is the teeth count on the larger sprocket/cog.
What cassette do I need for bike?
The rule of thumb for choosing the right bike cassette is that the closer the number of “teeth” from the largest and the smallest cogs, the smaller the variation between gears, which ensures a smooth gear change.
Can you put a mountain bike cassette on a road bike?
A mountain bike cassette can work on a road bike only if it has the same cog pitch as its road equivalent. If the cog pitch is different, the shifting would be inaccurate.
Are 9 and 10 speed cassettes the same width?
they are the same width. The distance between the 9 speed gears is ever so slightly wider than on a 10 speed cassette (hence why 10 speed chains need thinner side plates than 9 speed ones.
Will a 10 speed rear derailleur work with an 8 speed cassette?
A 10-speed derailleur can work with an 8-speed cassette only in one situation – if it's a road model designed by Shimano and not part of the Tiagra 4700 series. Why? Because the rear shift ratio of Shimano's 10-speed road derailleurs is 1.7 and matches that of 8 and 9-speed Shimano derailleurs.
Can I fit an 11-speed cassette on a 8-speed hub?
An 11-speed road cassette cannot be installed on an 8-speed hub. The hub is too narrow and creates rubbing between the chain and the spokes when riding in the smallest gear.
Are Campy and Shimano cassettes interchangeable?
Yes. Campagnolo wheels are compatible with both Shimano and SRAM components. In order to use Campagnolo wheels with any drivetrain on the market, Campagnolo produces two kinds of freewheel bodies: one specific for Campagnolo drivetrains (from 9 to 11 speeds) and one for non-Campagnolo drivetrains (from 9 to 11 speeds).
