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What is "crank preload"

I added a definition of preload to the terminology index under the bearings page, as this is a term that is frequently referred to but not clearly defined. Consider your crankset. Preload is how tight ...
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What does this barrel adjuster do on the rear derailleur (SRAM Apex 1)?

It lengthens or shortens the housing length to adjust the lateral position of the derailleur cage. It's used to adjust derailleur 'indexing' so that the chain sits properly on the cassette sprockets. ...
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9 votes
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What's the difference between Shimano HG and SRAM XD free hubs?

The phrase missing here is 'Freehub body'. The freehub replaced the freewheel, mostly, which integrated the sprockets and the ratcheting mechanism. The freehub body is therefore the ratcheting ...
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Can you change the rear hub on a tubular cyclo cross wheelset with out riping the tubular tyre off?

It is almost impossible to rebuild a wheel (i.e., new hub and new spokes) without removing the tire. Leaving the tire on, would mean leaving the spoke nipples in place. (It is a good idea to replace ...
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8 votes
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Stock 10 Speed Shifters with 9 Speed Transmission

Not entirely surprised you have problems refer here... According to this link, Cable Pull for a Campy 10 shifter is 2.8mm, dérailleur ratio for a Campy is 1.5 (or 1.4 for old) Cassette sprocket ...
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8 votes
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Which bikes come with SRAM Automatix

For those who aren't familiar, a SRAM Automatix hub is a 2-sped internal gear hub which shifts automatically, with the shift mechanism and everything contained in the hub. The mechanism is mechanical, ...
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8 votes

What's the difference between Shimano HG and SRAM XD free hubs?

SRAM's XD and XDR drivers (their term) don't have splines, unlike Shimano and Campagnolo freehub bodies. Instead, their cassettes screw onto the threaded section of the driver as shown in the image ...
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8 votes
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Can I use SRAM DUB Red Crankset in a Trek Madone SLR 7 that requires GXP?

Modern cranksets either have 24mm-ish width spindles, or 30mm-ish spindles. DUB (28.99mm spindle) falls into the latter category. GXP spindles (24mm, tapered to 22mm on one side) fall into the former. ...
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7 votes
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Can double chainrings be used with a clutch-type rear derailleur?

This does not work in the specific case of a Sram CX1 rear derailleur, or the case of any other X-Horizon™ mechanisms. I purchased the CX1 derailleur and attempted with a 46/39 front chainring combo....
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Alternative to tuning automatic hub?

Unwinding the spring, as the article states, will make the hub to shift when you're going faster. Without touching the internals, the hub will shift at the same speed, no matter how high the cadence ...
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  • 2,653
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Switching from MTB to road handlebars

You absolutely need SRAM shift/brake lever units. SRAM road shift/brake levers are compatible with their MTB derailleurs and come in a 1x11 version. Trying to mix Shimano and SRAM will just be a ...
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Carbon fiber crank arm with scratches--how much damage is a concern?

The thing with CF components is that you can't really tell much about structural integrity without specialized tools and knowledge unless it's obvious from the first glance. Anyway, SRAM carbon fiber ...
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Is there empirical evidence that SRAM DUB bottom brackets have longevity issues in the BB86/92 format?

You're looking for empirical data and you probably will never get any unless you do the testing yourself. The problem is that the alignment and tolerances of the frame bores and to a lesser extent the ...
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6 votes

Replacing a groupset in step purchases

If you want to upgrade gradually you need to follow the compatibility of the groupsets. If your Tiagra groupset is the 4600 series of 2012, the 10 speed components should be compatible with other ...
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6 votes
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How to know when to bleed a hydraulic disk brake / tips for improving disk brake performance?

Bad disc brake performance is almost always either air in the lines or oil on the pads. Air makes the levers spongey and oil stops the pads grabbing the disc. Your problem sounds like air, a bleed ...
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6 votes

SRAM Red 1098 Cassette "teeth"

In general, when you see oddly shaped teeth or variations on a cassette/chainring, its there to facilitate shifting (such as Shimano Hyperglide, and ramps/pins you see on chainrings/cassettes; see ...
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6 votes

Is 1x11 better than any 2X10?

Neither system is better than the other. In some situations, 1x is better, in others, 2x is better. As cassette range expands, effectively because the largest cog is getting bigger, the advantageous ...
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6 votes
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Eagle chain B-gap adjustment without plastic tool

This measurement is given by both Shimano and SRAM as the shortest distance between the circles formed by the tips of the teeth of the largest cog and those of the guide pulley. The spec for Eagle is ...
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Explanation on the lineup of Shimano Derailleurs

refer here: https://productinfo.shimano.com/download/pdf/spec/3.1/en Mostly this is MARKETING. Shimano tend to use the same designs for a lot of their products, but typically these are introduced ...
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6 votes
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SRAM Eagle XX1 Cassette creaking under torque, only after warming up

So after replacing the free hub and didn't help, I looked closer and realized the creaking was happening at the little spline fingers that flare out on the outside of the cassette to hold it in place. ...
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6 votes

Can I combine SRAM Rival 22 Levers and Shimano 105 Rim Brakes?

For BR-5700, BR-5800, and BR-R7000 they run off the various new school Shimano not-quite-short-pull cable travel numbers. SRAM road levers are all basically traditional short pull, which is less cable ...
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6 votes

Quarq dfour installation

Some cranksets are modular. I'm not sure if this is a standard term, but I do mean that the crankarms fit to the spider with a splined interface. Thus, you can replace the spider. Less commonly, on ...
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5 votes

Can I replace my Shimano outer chain ring with a SRAM?

You can use the chainring, but each brand (Shimano, SRAM, etc...) aligns the shifting ramps and pins to work best with their own brands inner rings. So the indexed shifting will not be as fast/smooth ...
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BB92 (Shimano bottom bracket) with SRAM 30mm crankshaft (X01 or XX1 BB30)?

BB92 is also known as PF41. The shell width should be 91.5mm and the inner diameter should be 41mm. 30mm: According to SRAM's 1x11 frame fit specifications, the inner part of the XX1 "spider" sits ...
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5 votes

Can double chainrings be used with a clutch-type rear derailleur?

Yep, I've been using such setup for an year now, on my MTB (2x10). See the "Technologies" tab on SRAM's page for X9 RD Type 2. The equivalent technology by Shimano is called Shadow+ (note the +). ...
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  • 13.1k
5 votes

What is "crank preload"

Crank preload is there to ensure that cranks are not over tightened so that they cause premature failure of the bearings. It allows the cranks to be "finger tightened" prior to the pinch bolts been ...
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  • 8,777
5 votes

SRAM X01 Eagle (12speed) in 11speed transmission: it work?

To quote Art's Cyclery: "Eagle drivetrains are not backwards compatible in any way (the exception being SRAM’s direct mount cranksets, which will still require a new Eagle chainring)" and VitalMTB: ...
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5 votes
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Barrel adjuster for sram gx rear derailleur?

You need any inline barrel adjuster.
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5 votes
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Has SRAM discontinued i-light hub dynamo?

According to this page yes, the hub is discontinued and is no longer available @armb's assumption may be true. They stopped making IGH's and dynamo hubs for the same reason, at the same time. I-...
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  • 2,653
5 votes
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Can I reuse Jagwire hydraulic brake hose?

Technically you could, but it's a very bad idea. The two fluids are incompatible and will contaminate each other, forcing you to re-bleed sooner than expected. Whichever solvent you use to clean out ...
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