A boost DUB crank is a crank meant for a boost drivetrain (12x148 or QR141) with a 52mm chainline, with a 28.99mm spindle. Boost is a term to specify 148mm rear thru axle spacing. This replaced 142mm and has been somewhat superseded by SuperBoost at 157mm.
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 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.
Are all dub cranksets the same?
Yes. DUB is fully compatible with all major existing frame BB shell standards. So you will not need to re-design anything on your existing frames. DUB BBs will fit into the following frame BB shell standards.
Do you need a boost crankset?
To guarantee the same drivetrain performance, Boost compatible cranks are absolutely necessary, or directly mount the Boost-specific chainring Spider. This offsets the drivetrain by 3mm to equalize the cassette's movement. The cranks' Q factor remains unaffected, as too do the axle and bearings.
39 related questions foundWhat is dub crank?
In 2018, SRAM introduced mountain bike cranksets which use a new technology name DUB™ (Durable Unified Bottom Bracket). Meant to simplify frame BB and crankset compatibility across their product lines, it brought about yet another standard to understand.
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 dub and dub boost?
Boost is a term to specify 148mm rear thru axle spacing. This replaced 142mm and has been somewhat superseded by SuperBoost at 157mm. DUB is Sram's proprietary axle and BB system for their mountain bike cranks and utilise a proprietary 28.99mm axle diameter (yes, they actually specify that measurement) and bearing.
What cranks work with SRAM dub BB?
As such, below is a list of bottom bracket standards that SRAM's DUB cranks will be compatible:
- BSA 68 (threaded)
- BSA 73 (threaded)
- BSA 100 (threaded)
- PF89. ...
- PF92.
- PF121.
- BB30 73.
- PF30 73.
What cranks work with dub BB?
DUB is compatible with BSA threaded, PF86, PF92, BB30 (73mm shell) and PF30 (73mm shell) bottom brackets and cranksets are completely interchangeable between the different standards.
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.
How do I convert non-boost to boost?
You can just order a boost-conversion kit off of ebay with two 3mm spacers on each side, 3mm brake rotor spacer, and re-adjust your derailleur. That's how I run my non-boost rear wheel in a boost bike and it works beautifully. Compatible with 142x12 Rear Industry Nine Torch hubs. They say a re-dish is needed.
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 on a mountain bike?
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.
What is the difference between boost and non boost hubs?
Boost refers to front hubs which are 10mm wider and rear hubs which are 6mm wider than 'standard. ' Boost front hubs use the same diameter 15mm front and 12mm rear axles. By making the hubs wider wheels can be built which are stiffer, and more clearance is available for 11 speed drivetrains.
What does boost mean on mountain bikes?
So what does Boost do? To recap, a wider axle puts the hub flanges – where the spokes attach – further apart. Doing that alters the angle of the spokes, and gives the triangle between them and the rim a wider base. This improves the whole wheel's stiffness and creates greater lateral strength – which is a good thing!
Is SRAM dub any good?
SRAM GX Eagle DUB Alloy crank is SRAM's massively popular, best quality and priciest aluminium crank. It was completely overhauled last year and uses the brand's relatively new DUB axle diameter and bottom bracket standard.
What is the point of SRAM dub?
The new Durable Unifying Bottom Bracket, or DUB for short sees SRAM radically changing their entire crankset and bottom bracket approach for 2018. DUB shrinks the diameter of the axle just enough to allow for proper sealing with all bottom bracket configurations.
Are SRAM dub bottom brackets good?
That's why you can see it was easy for us to give SRAM DUB Pressfit Bottom Bracket such a high overall score of 9.4 / 10. It seems to have the perfect combination of features, quality and price making it a great all-rounder.
Can you use a SRAM crankset with Shimano bottom bracket?
Higher-end SRAM cranks demand a SRAM bottom bracket for secure installation and optimal performance. Thus, they aren't compatible with Shimano bottom brackets.
What cranks will fit my bike?
Cranks come in a range of sizes, most commonly from 165mm to 190mm, and ideal crank length is often determined by three factors: your height, your cycling discipline and your personal preferences. If you change your crank length, it will change how it feels to pedal your bike, and it may change your fit on your bike.
Can you convert GXP to dub?
Registered. Yes the chainring will transfer over from GXP to DUB.
What is boost spacing on a bike?
Boost gives a 148 x 12mm spacing which allows for the hub flanges to be further apart which gives a potentially stronger and stiffer rear wheel.
What is boost MTB hubs?
A new Mtb hub arrived on the market over the last few years. Its name is Boost, a dropout standard designed to widen the hubs on wheels, increasing the rear axle by 6mm and the front axle by 10mm without compromising modern trail geometry or durability.
Is 30mm a dub?
Called DUB (Durable Unified Bottom bracket), the most significant update is the change to a 28.99mm spindle for all mountain bike cranks. Previously, SRAM had two different spindle diameters (30mm and 24mm), along with a range of bottom bracket bearing sizes.
