What should my chainline be?

The bike center line is an imaginary plane running front to rear through the middle of the bike. For example, a front crankset and/or front derailleur might be designed to have a chainline of 47.5mm. This means it will work best when the middle of the crankset is 47.5mm from the middle to the bike center line.

How do you calculate chainline?

Chainline is measured from the centerline of the frame to the center of the chain. You can measure the front chainline directly with a simple ruler. Simply hold the ruler against the seat tube or down tube and measure the distance from the middle of the seat tube to the middle of the chainring teeth.

Is 52mm chainline boost?

The nominal chainline for a boost hub is 52mm. But the optimal chainline for your bike might be more or might be less depending on your frame, hub, and cluster.

What is a 49mm chainline?

What is chainline? Chainline is the distance between the centerline of your frame and the average centerline of your chainring(s). For 1X this is easy – If the center of your chainring teeth is 49mm from the centerline of your frame then your chainline is 49mm.

Do you need boost spacing for 12 speed?

If you are running 12 speed, the clearances are so small between chain and cassette that you MUST run a boost spaced chainring with a boost spaced bike. If you don’t, the chain will “tick” on the next bigger cog when in the smallest 2-3 cogs on the cassette.

Can I use a 68mm bottom bracket in a 73mm shell?

Multiple spacers are included in order to fit both sizes meaning if you see a BB for sale that says 68/73 it means it will fit both but it includes a couple spacers in the box to make it fit the 68, those spacers (or fewer of them) are not needed if the shell is 73mm wide.

Does chainline matter on a 1x?

Why isn’t that used as the chainline?” Well, for proper shifting on a 1x setup you want to be at least ~2 mm to the outside (towards the small cogs) otherwise the chain will catch on the next bigger cogs when pedaling in the smaller cogs. So a perfect 1x with minimal cross-chaining in the big cassette cogs is 46-47mm.

What is 1x chainline?

Chainline is the distance between the centerline of your frame and the average centerline of your chainring(s). For 1X this is easy – If the center of your chainring teeth is 49mm from the centerline of your frame then your chainline is 49mm.

What is chainline Q-Factor?

Q factor is nothing to worry about. It’s the distance between the outer edges of each crank arm. Road bike q factor is narrower at around 150mm and MTB is around 170mm and are pretty standard.

Can you fit a 12 speed cassette on a 10 speed hub?

In addition to being able to fit our 12-speed cassettes on Shimano HG 10 and 11 speed freehubs, you can also convert the ROTOR 13-speed cassette into a 12-speed one and use it with your current wheels.

How do I know what size bottom bracket to buy?

To find out the size of bottom bracket needed, measure the inside of the bottom bracket shell in your frame, it will be 73mm, 70mm or 68mm. Some older frames may have Italian threaded bottom brackets, instead of the more modern English.

Do I need spacers on my bottom bracket?

Much like GXP, you don’t need to add any spacers to the bottom bracket if you have a 73mm shell, but you will need to add a 4.5mm spacer to the right-hand side of the crank axle, unless you’re using a chain guide, in which case a 2mm spacer is required instead, along with a 2.5mm spacer on the right-hand side of the …

How is chainline fixed gear measured?

The “Chainline” column is the distance from the mounting shoulder to the centerline of the sprocket teeth. To figure the actual chainline for a given combination, add the number from the “chainline” column of the sprocket or freewheel to the corresponding “chainline” column of the hub chosen.

Why is chainline important?

The chainline is very important for several reasons: more efficient transmission; the less you bend the chain, the smaller the power loss; better function and less chance of the chain falling off the rings; less wear due to less friction; better function of the front derailleur; and quieter operation.

How wide is a 1x chainline?

Unfortunately, if you were to remove these rings and install a standard narrow-wide ring the resulting 1X chainline would be about 52mm. This is 3mm wider than the ideal 49mm 1X chainline but makes up the vast majority of all 1X conversions.

What size chainring for X01?

I have X01 with a 32t chainring. With the 10-42t cassette can comfortably climb for extended periods and attack short steep stuff with enough legs going back down. Cant go too far wrong with a 32…

What size chainline do I need for my bike?

Shimano spec, measured to the middle ring. 47.5 preferred, but for frames with oversized seat tubes, the longer dimension may be needed, because the fat tube places the front derailer mechanism farther to the right. SRAM standard chainline is 49mm with 142mm OLD and thru axle This is close to the chainline of the outer ring of a typical MTB triple.

What is a perfect chainline?

The word “chainline” refers to how straight the chain runs between the front and rear sprockets. Ideally, both sprockets should be in the same plane, so that there is no sideward motion or stress to the chain. This constitutes “perfect chainline”.