Sram red quarq nhb and hb chainrings
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- protocol_droid
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I did a search but didnt find what i was looking for.
Okay so im currently running a sram red 100bcd gxp crankset with hidden bolt (threads into crankarm) extralite chainrings. I just purchased a used sram red quarq gxp crankset and i noticed it was nhb (recessed threaded insert in the chainring) which i didnt realize there was the option. Anyhow,
1) can i rotate the quarq spline so the chainring bolt thats under the arm can be accessed outside the arm so i can use my hb extralite rings?
2)if not, which nhb lightweight chainrings can i purchase? I saw praxis buzz but none had the threaded insert on the chainrings that i could see.
Any ideas would be greatly appreciated.
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Okay so im currently running a sram red 100bcd gxp crankset with hidden bolt (threads into crankarm) extralite chainrings. I just purchased a used sram red quarq gxp crankset and i noticed it was nhb (recessed threaded insert in the chainring) which i didnt realize there was the option. Anyhow,
1) can i rotate the quarq spline so the chainring bolt thats under the arm can be accessed outside the arm so i can use my hb extralite rings?
2)if not, which nhb lightweight chainrings can i purchase? I saw praxis buzz but none had the threaded insert on the chainrings that i could see.
Any ideas would be greatly appreciated.
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naked 3po, the first weight weenie.
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protocol_droid wrote: ↑Sun Nov 28, 2021 10:33 pmI did a search but didnt find what i was looking for.
Okay so im currently running a sram red 100bcd gxp crankset with hidden bolt (threads into crankarm) extralite chainrings. I just purchased a used sram red quarq gxp crankset and i noticed it was nhb (recessed threaded insert in the chainring) which i didnt realize there was the option. Anyhow,
1) can i rotate the quarq spline so the chainring bolt thats under the arm can be accessed outside the arm so i can use my hb extralite rings?
2)if not, which nhb lightweight chainrings can i purchase? I saw praxis buzz but none had the threaded insert on the chainrings that i could see.
Any ideas would be greatly appreciated.
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Both the 8-bolt and 3-bolt DM interfaces are keyed so you can only orient the Quarq spider one way.
There should not be a threaded insert in chainrings used with NHB spiders or cranks. The threaded insert is only for chainrings used with modular HB spiders. You can use any 110bcd 5-bolt chainrings with NHB spiders. Even the SRAM chainrings should have anti-drop pins in the right position for both HB and NHB at this point.
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- protocol_droid
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Hey tobin. Thanks for chiming in. You can see there are serrated edges on the chainrings and the bolt. None of the other chainring holes have this. I had to whack this thing out. So i can just unscrew the 8 bolts on the arm and rotate the quarq assembly to access the bolt from both sides?
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naked 3po, the first weight weenie.
- protocol_droid
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Hi tobin. So you can see that this one has serrated edges to wedge in place in the chainrings. The others do not have this.
So i can unbolt the 8 bolts of the quarq module and rotate the arm so the one bolt aligned with the arm can be exposed for full chainbolt access?
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So i can unbolt the 8 bolts of the quarq module and rotate the arm so the one bolt aligned with the arm can be exposed for full chainbolt access?
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naked 3po, the first weight weenie.
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The serrated edges in the chainring are bite marks from the knurled nut. They weren't there before it was installed. NHB SRAM chainrings are just...chainrings. If you had a setup that required installation of the knurled nut, you'd have to install it on whichever chainrings you choose whether it's Praxis, Rotor, etc.
I have no idea why the knurled nut was installed on a NHB setup...it's not necessary. The only time the knurled nut is needed is when you are using modular HB cranksets, making it hard to inconvenient to use a regular chainring bolt.
I have no idea why the knurled nut was installed on a NHB setup...it's not necessary. The only time the knurled nut is needed is when you are using modular HB cranksets, making it hard to inconvenient to use a regular chainring bolt.
Last edited by TobinHatesYou on Sun Nov 28, 2021 11:23 pm, edited 1 time in total.
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Duplicate post
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naked 3po, the first weight weenie.
- protocol_droid
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Thanks tobin. So theres not problem with unbolting the 8 bolts and rotating the quarq meter to expose that 5th chainring?
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protocol_droid wrote: ↑Sun Nov 28, 2021 11:28 pmThanks tobin. So theres not problem with unbolting the 8 bolts and rotating the quarq meter to expose that 5th chainring?
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NO, I said it isn't possible (without modification) in my first reply. The 8-bolt interface is keyed. One of the valleys is shallower than the rest. Unless you take a round/needle file to the interface on the Quarq, it won't fit.
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All the chainring bolts are already exposed on a NHB spider so I can only assume that you're really confused and using the wrong terminology. You, in fact, have a HB Quarq and that's why the big chainring that came with it had a knurled nut installed.
- protocol_droid
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Ok my bad. I thought hidden bolt was the one bolt that screws into the crankarm while this version with the knurled nut is non hidden bolt.TobinHatesYou wrote:All the chainring bolts are already exposed on a NHB spider so I can only assume that you're really confused and using the wrong terminology. You, in fact, have a HB Quarq and that's why the big chainring that came with it had a knurled nut installed.
So as you mentioned i would need to use this knurled nut for my extralite chainrings to make them work. Thanks.
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protocol_droid wrote: ↑Sun Nov 28, 2021 11:52 pmOk my bad. I thought hidden bolt was the one bolt that screws into the crankarm while this version with the knurled nut is non hidden bolt.TobinHatesYou wrote:All the chainring bolts are already exposed on a NHB spider so I can only assume that you're really confused and using the wrong terminology. You, in fact, have a HB Quarq and that's why the big chainring that came with it had a knurled nut installed.
So as you mentioned i would need to use this knurled nut for my extralite chainrings to make them work. Thanks.
It looks like Extralite chainrings only have one position for the chain anti-drop pin. You might want to buy the version with the pin in the right position (in line with one of the chainring bolts.)
- protocol_droid
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Its got 2 positions for the pinTobinHatesYou wrote:protocol_droid wrote: ↑Sun Nov 28, 2021 11:52 pmOk my bad. I thought hidden bolt was the one bolt that screws into the crankarm while this version with the knurled nut is non hidden bolt.TobinHatesYou wrote:All the chainring bolts are already exposed on a NHB spider so I can only assume that you're really confused and using the wrong terminology. You, in fact, have a HB Quarq and that's why the big chainring that came with it had a knurled nut installed.
So as you mentioned i would need to use this knurled nut for my extralite chainrings to make them work. Thanks.
It looks like Extralite chainrings only have one position for the chain anti-drop pin. You might want to buy the version with the pin in the right position (in line with one of the chainring bolts.)
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- protocol_droid
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Thanks again. Got it all buttoned up now.TobinHatesYou wrote:Good to go then.
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I’m looking to buy a SRAM Red BB30 crank with the hidden bolt behind the crank arm. Are there any limitations on the chainrings I can use with this? I’d like to get something like the Praxis Buzz or Tune/BOR rings. Can I use any rings that have a 110BCD?
If it makes any difference it is the later 11speed exogram crank like this
If it makes any difference it is the later 11speed exogram crank like this