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Hi all,
I've an orange alpine 6 boost frame which currently has a hope bottom bracket and crankset. The bearings don't last 2 minutes and the cranks are a pain to remove and put back on, so I am seriously considering swapping out for a 24mm bb and an easier to install crankset.
I've been looking online but a lot of cranks state they are non-boost, but is that all that important?
For example, I've looked at CRC at the Shimano saint which states its a 10sp crankset, but looking in the Q&A's people are running 11sp (which I do). But it also states it is not suitable for a boost frame. Is anyone here running one?
Any other recommendations would also be appreciated 🙂
Thanks in advance
I've ran all types of Shimano cranks on boost frames with no problems.
Ones that spring to mind are
XTR M970 converted to 1X on middle ring with 30 and 32T ring.
SLX 10 sp converted to 1X as above
XTR M9020 single ring with 30 or 32t matching rings.
None of them a problem on the bikes with 10 or 11 speed 1X set ups.
However my latest bike (ibis Ripmo) fouled the chainstay when I tried to use a non boost X01 crank with 32t ring, so I guess the answer is - it depends on the bike.
Not what you wanted to hear but maybe somebody who has your frame can comment.
I currently run non boost on my stage 6, no issues at all. I have hope bb with raceface turbine crankset. It's the cinch chairing that mKes it boost or non boost anyway. One thing with hope bb, the pre load ring needs to only just eliminate play, Amy more and it will fudge the bearings
Disclaimer: I am not an expert. Assuming you have the BB installed with the right spacers for the frame width, is it not the offset of the chainring that is the difference ?
is it not the offset of the chainring that is the difference ?
This is correct. It's all in the chainring but as you have an Orange fouling the chainstay is not going to be a problem.
You'd simply swap the non drive spacer to the drive side to keep the chain-line if it was a problem.
I fitted non boost xtr to my sonder. Thought I’d scored as ring was well away from stay but as I tried to spin crank the arm was touching the stay(just) but under load it would have made a mess !! Try it you might get lucky
A non boost simply puts the chainring 3mm closer to the stays and also the main pivot on some frames, I can't see any issue seeing as the spider slams up against the bb just the same, you'll have a better chainline for climbing, but the smallest cog might be noisier.
I just failed to make a non boost XT 10 speed crank work in a boost frame.
I think it could work with a larger chainring but I was using a 30t which just doesn't work with a sane chain line
I run a non-boost 2x10 XT chainset (as a 1x11) on a boost frame, chainline looks good.
non-boost chainline is actually better.
it's all about whether the crank/ring itself fouls the chainstray/pivot. If it doesn't then non-boost is fine.
+1 Hope are annoying to fit/refit. The evo design solves this, obvs.
I have run a non boost 2x10 xtr crank as a 1x12 for that last few years with no issues, chainline is fine and wear is no different to my other setup with a boost crank 1x12. Personally ( and I’m no expert) as long as it fits go for it, the rest is all a load of marketing bull.
non-boost chainline is actually better.
it’s all about whether the crank/ring itself fouls the chainstray/pivot. If it doesn’t then non-boost is fine.
^^ this 100%
...and as a followup - the problem I had was that the Hope chainring, for all that it's an excellent product, on the 30t it's just necessarily too far away from the spider.
I'm using a 142mm wheel in a boost frame with the 3mm spacers, so the cassette is already too far inboard, and with the way that the chainring works, the chainline ends up really awful.
However...I rushed out and bought a shiny new XT 12-speed chainset, only to realise this morning that it's non-boost.....but it actually works out really nicely.
i.e.
non-boost chainline is actually better.
it’s all about whether the crank/ring itself fouls the chainstray/pivot. If it doesn’t then non-boost is fine.
^^ this 100%
A couple of people have mentioned using a non boost 2x as a single ring, that basically is a boost single chainline, thus irrelevant.
works fine as a single ring on a cotic flaremax ..
However, I do not have a boost rear wheel and use an adaptor kit