Shimano states 52mm to be boost and 142 dedicated, 55mm apparently boost dedicated giving better chain line. Looks like there isn't a 55mm “better” boost for XTR. I found 55mm to be much better for boost with a 5010 frame.
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.
What is chainline measurement?
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.
What is boost on a crankset?
boost just refers to bikes that have a 148mm wide spacing between the dropouts for the rear hub, the Drivetrains are shifted outboard by 3mm. This may or may not affect the crank axle length depending on the bike and crank combo, In most case it has just resulted in wider q-factor cranks and not longer axles.
What offset chainring for non boost?
There are 3 offsets: Standard Road/CX/Gravel: 6mm offset for cyclocross and road crank applications with 47mm chainline. Standard MTB: 6mm offset for non-Boost mountain bikes, GXP and long spindle BB30 cranks for 49mm chainline. Boost: 3mm offset for 52mm chainline.
29 related questions foundWhat offset for super boost chainring?
157 (Super Boost) uses a 0mm offset chainring. For a 135mm rear hub, you'd use a 6mm chainring.
What is chainline MTB?
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. It gets slightly more difficult if you have multiple front chainrings.
What size is boost?
As for the specifics, Boost has a front hub width of 110 x 15 mm and rear hub spacing of 148 x 12 mm that results in increased wheel strength on all wheel sizes as well as added design flexibility.
Are boost cranks different?
The only different between boost and non boost drivetrain kits is the crankset. The only different between a boost and non boost crankset is the chainring. You can swap a crankset from boost to non boost or vice versa just by installing a different chainring.
What size is a boost Hub?
Boost hubs use 15 x 110mm front and 12 x 148mm rear spacing. This means the hub flanges can be set wider apart to increase the lateral stiffness of the wheel, but it makes Boost incompatible with all the older standards.
What is boost spacing?
Boost spacing allows for wider hub flange spacing, which correlates to better spoke bracing angle and dish when building wheels (this makes the wheels stronger). The brake rotor sits 3mm outboard of where it did before, as does the rear cassette.
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.
What is boost in MTB fork?
What is Boost? Boost is the latest and greatest axle platform which all performance mountain bike frame and fork manufacturers are adopting. Boost widens the rear axle by 6mm and the front axle by 10mm. So what does Boost do for you? A wider axle means that the spacing between your hub's flanges can be increased.
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.
What is MTB crank offset?
Offset moves the chainring further away from the crank and closer to the seat tube. Reducing the offset from 6mm to 3mm on a long-spindle (external bearing BB cup) crankset will result in a 52mm chainline.
Does bottom bracket spindle length matter?
The critical thing is your spindle length: as long as you can set up the correct chainline you will be good to go. But, again, best never to mix standards if you can at all avoid it. If you are looking to replace a cottered crank setup with a square taper setup, then look no further than a cartridge bottom bracket.
What is the difference between boost and super boost cranks?
“Super Boost” was a rear standard that was wider still at 157mm. Adoption of this standard has been slower than Boost, but is slowly picking up steam. Brands such as Pivot, Knolly and Devinci have been carrying the banner loudly. Regardless of what your bike has, all of our hub partners offer products in each spacing.
What is the difference between boost and non boost?
Boost is ever so slightly better for stiffness but 6mm is pretty minimal, mostly unnoticeable for an average rider. New rims, especially going wider makes far more difference than boost ever will. Boost however is 3mm more room for the cassette, makes a big difference when going wider tires.
Can I use a non boost crankset on a boost frame?
The boost version has 3mm of offset. I was under the impression (probably incorrectly, but it hasn't affected my application) that there is no boost or non-boost specific crankset and that chainring offset is the determinant. Regardless, the short answer is yes.
What is Boost in a car?
Boost is positive pressure created by a turbo or supercharger. It forces more air into the engine. This can be matched with more fuel, to create a bigger bang inside the cylinders - resulting in more power.
What is Super Boost Plus?
What is Super Boost Plus? Super Boost Plus (or SB+ for short), is a “standard” of rear axle spacing for trail and enduro bikes. Introduced by Pivot Cycles in 2016, SB+ builds on the increased rear wheel and frame strength brought about by the change to Boost 148 mm spacing.
What is the boost drink for?
Boost offers two ready-to-drink shakes explicitly designed to produce a lower blood sugar response in people with diabetes — Boost Glucose Control and Boost Glucose Control High Protein.
What is crankset Q-Factor?
Essentially Q-Factor is the distance between the pedal attachment points on the crank arms, also referred to as Tread. It could also be described as the width of your crankset. This affects your stance, if you've ever been snowboarding think of it as the same thing, essentially the distance between your feet.
What are chain lines?
Chain-lines, or chain lines, are the prominent, wide-spaced, parallel lines in laid paper, used in both manuscripts and printed books, left by the wire mesh across the bottom of the ... From: chain-lines in A Dictionary of English Manuscript Terminology 1450–2000 » Subjects: Literature — Bibliography.
