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.In 2018, SRAM introduced mountain bike cranksets The crankset (in the US) or chainset (in the UK), is the component of a bicycle drivetrain that converts the reciprocating motion of the rider's legs into rotational motion used to drive the chain or belt, which in turn drives the rear wheel. › wiki › Crankset
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.
Is dub the same as BB30?
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.
Which is better GXP or dub?
What are the main differences between DUB and GXP? DUB uses an oversized aluminum spindle, while GXP uses a 24mm steel spindle. DUB cranks fit into all major existing frame BB shell standards while GXP only fits into the 24mm specific versions. DUB BBs are also more durable than GXP BBs.
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.
39 related questions foundDoes GXP fit dub?
Registered. Yes the chainring will transfer over from GXP to DUB.
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.
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.
What is Dub and 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 This replaced 142mm and has been somewhat superseded by SuperBoost at 157mm.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 are compatible with SRAM dub bottom bracket?
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 is dub BB30?
This SRAM DUB Road bottom bracket allows you to add a wider crank to your BB30 gravel frame with a 68 mm over locknut dimension. The spacers create space for the crank axle and thus enlarge the chain line.
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.
How do you tell if a cranks will fit my bike?
Most manufacturers will print the type on the bottom bracket shell of your bicycle. Look for a match between the “shell width” of the bottom bracket and the “diameter” of the crankset's axle. If both are equal, use the crankset. On the other hand, you can use the BCD (Bolt Circle Diameter) to check compatibility.
How do I know 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.
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.
How long should a SRAM dub bottom bracket last?
"The durability [with DUB] has been very good. I've had the same bottom bracket in my bike since August and have had no issues with it. Normally I have 24mm or GXP cranks on my bikes and I replace my BB when its worn. Usually 4-8 months depending on how much I am riding and the conditions.
Does Dub fit pf30?
Registered. Battery said: Yep, you need a DUB BB for a DUB crank.
How tight should crank arms be?
Registered. Most square taper crank arms should be 29 ft-lbs. That is pretty darn tight. As has been mentioned, if it came loose, the crank arm is likely damaged beyond repair already and needs to be replaced.
What does SRAM preload adjuster do?
Essentially, a crank preload adjuster takes up any slack between your crank arms and your bike frame to ensure your bottom bracket doesn't creak or wear out prematurely.
What tool is SRAM dub BB?
The Sram DUB threaded bottom bracket uses a 12 point tool. We will be using a RaceFace Cinch Bottom Bracket Wrench in this demo, but using a Park Tool BBT-79 Bottom Bracket Tool is recommended.
Are Shimano and SRAM cranks interchangeable?
Thus, cranks from Shimano, SRAM, and Campagnolo are freely interchangeable along with those from all aftermarket brands (e.g. FSA, Rotor, Praxis, etc.). And while it is preferable to match the chainrings/crankset to the transmission, there is no strict need to do so.
How do I know what size crankset to buy?
Crank length is measured from the centre of the bottom bracket axle to the centre of the pedal axle. If you're not sure what length the cranks on your bike are, the quickest way of finding out is typically to just look at the backside of your cranks, just below the pedal axle.
Can you use a SRAM crankset with Shimano?
Buyers are free to use a SRAM chain and cassette with their Shimano groupset, and vice versa, just as a SRAM chain can be paired with a Shimano cassette, and vice versa. SRAM's cassettes and chains are compatible with all of Shimano's groupsets, and vice versa.
Can I mix Shimano and SRAM?
Most importantly, YOU CANNOT mix Shimano and SRAM hydraulic brake parts. It's more than a performance issue — it's a safety issue. Shimano brakes employ mineral oil as hydraulic fluid, whereas SRAM uses DOT brake fluid. Those are incompatible — one is insoluble in water, and the other is water soluble.
