- Middleburn cranks – are they that great?
I’ve been having a look at Middleburn crank arms (ISIS) as a possible upgrade; lots of people seem to rate them but at the end of the day they do seem to be a bit expensive for a couple of solid lumps of aluminium and I’m not sure that they’d compare too well (for the money) to my old hollow forged XT arms.
My only experience of Middleburn products have been their chainrings (which again people seem to rate) which I hated.
What I do like is the modular arm/spider setup which would allow me to fit them to my current 3×9 setup and then switch to a Duo spider when I go 2×10.
What are people’s experience of Middleburn crank arm; are they really something special or is it a bit of a ‘label’ thing?Posted 4 years agoNorthwindSubscriber
They’re alright. Can look perfect on the right bike, which is probably the only real reason to get ’em tbh… And they have very tidy single ring options etc. Otherwise, they’re a little heavier than XT, and the Middleburn rings are pretty rotten- though obviously you can fit better rings. But by the time you’ve spent more for the crank arms than it costs for a complete XT chainset with rings and BB, then bought a bottom bracket, then bought a set of rings, you may be wondering what the hell you were thinking.Posted 4 years agoandrewhMember
Got 3 sets.Posted 4 years ago
RS8 square on UN74
RS8 X-type on Chris Bling
RS8 X-type with press fit XTR
All triples and all with Blackspire Superpro rings.
Performance and durability excellent. Interchangable spiders also a goood thing.
Downsides are the weigh and that the colour rubs off the black ones pretty quick.
AVOID ISIS LIKE THE PLAUGE. Square is great, either UN74 or Royce if the budget will allow.HT11 X-types allow the use of CK BBs and they are fine, Shimano HT11s less so.coolhandlukeSubscriber
Light, they work, are strong, look nice
Square taper BB’s last years, what’s not to like other than the weight of a square taper BB?
UN anything is fine but 54 or 55 works and is available
Not changed my BB for years, think its a 54? But was changing external (cheese) bearings every few months.Posted 4 years agoSinglespeed_ShepMember
I’ve had a few pairs over the years, still got one set with square taper on one of my bikes. I do like them, you can fit and forget them and they look good. I much preferred them to Shimano XT HT2 but I don’t think they are the best cranks in the world.
But recently I switched to Raceface atlas. Using a ht2 ceramic bb these are the best cranks I’ve used.Posted 4 years agomattbeeSubscriber
Love them. Rs7 sq taper on both my bikes as UNO on ss and using a Duo inner ring on my 1×10.Posted 4 years ago
Have a little bit of taper damage to one set that is causing a creak but they are still soldiering on and at 12 years old I’m not too upset as I’ve had my money’s worth out of them. Happily Middleburn will sell me an individual arm direct too so I will replace it and keep them running.DaveyBoyWonderMember
Happily Middleburn will sell me an individual arm direct too so I will replace it and keep them running.
In comparison, when I tried to order a single arm for my X-Type RF Deus cranks when the splines died I was told no, because each arm is specific to the axle. WTF – they all come out the same machine?!
They went straight into the bin. Goodbye £250 cranks and 18 months use…Posted 4 years ago
I’ve come across a site selling reduced price ISIS Middleburns and I was under the impression that current ISIS BBs were more durable than of old, but I suppose that if nobody is making ISIS cranks anymore then ISIS BBs will start to disappear. For some reason I still like old style cartridge BBs so could go square taper.Posted 4 years ago
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