Quick Release Seatpost Clamp

Mr_Brick · 2011-09-09, 01:17 PM

I have been riding my 24" muni longer distances recently(~10mi), and have noticed how much seat height makes a difference for different riding conditions and obstacles. I was wondering if anyone uses a quick release seat clamp on a muni, and if that is strong enough/small enough to be effective, but out of the way, etc. I know a lot of beginner unicycles use the quick release clamps, but I'm curious to see if there is a quick release option for a high-end uni. Regardless I need some padded shorts for the rubbing, but that's a whole other issue...

saskatchewanian · 2011-09-09, 01:31 PM

I use quick releases on almost all my unicycles, including my MUnis and road unicycles with long handles.

A high end quick release like Salsa or Hope will hold your post nearly as strongly as a dual bolt clamp.

Mutaito · 2011-09-09, 02:18 PM

I originally used a QR on the 24x3 Cross Quax MUni of our unicycle club, and it work so good that I decided to put one even on my KH29" with dual hole cranks! Love it

bouin-bouin · 2011-09-09, 08:18 PM

I'm using Hope QR on my KH29 and 36 with dual cranks, perfect !

dragonzfly · 2011-09-10, 12:50 AM

I have a QR on everything except my 20 inch trials.
Works like a charm, and it means I can adjust my muni etc on the fly.

DavidHood · 2012-05-23, 10:39 PM

I'm getting a couple of Hope Quick release seat post clamps the next time I order something from Chain Reaction Cycles and I wanted to double check with you guys to make sure I have the dimensions right.

For my Nimbus Oracle I need a 28.6 OD
For my KH36 I need a 31.8-32.0 OD

Agreed?

Nurse Ben · 2012-05-24, 01:23 AM

Back when we had a unicycling magazine, there was a "compression test" comparing seat post clamps. Lowest clamping pressures were the KH and Nimbus double clamps, highest pressures were with the Salsa and Hope QR clamps.

I like Hope best, but they are hard to find, so Salsa works fine in anodized.

I have them on all my unis, use them on rides to adjust for changes in terrain, leg fatigue, shoe differences, swapping unis with buddies, etc...

Fixed clamps are so yesterday

scotthue · 2012-05-24, 02:03 AM

Quote:

Originally Posted by DavidHood

I'm getting a couple of Hope Quick release seat post clamps the next time I order something from Chain Reaction Cycles and I wanted to double check with you guys to make sure I have the dimensions right.

For my Nimbus Oracle I need a 28.6 OD
For my KH36 I need a 31.8-32.0 OD

Agreed?

Yup.

hollywood · 2012-05-24, 03:50 AM

What size clamp would I need for a KH 26?

OutdoorJunkie · 2012-05-24, 03:57 AM

Quote:

Originally Posted by hollywood

What size clamp would I need for a KH 26?

31.8mm.

bouin-bouin · 2012-05-24, 06:13 AM

Quote:

Originally Posted by OutdoorJunkie

31.8mm.

right answer, I'm using 31,8mm Hope QR on my KH26/29/36

DavidHood · 2012-05-24, 11:27 PM

Quote:

Originally Posted by DavidHood

For my Nimbus Oracle I need a 28.6 OD
For my KH36 I need a 31.8-32.0 OD
Agreed?

Heads up! I was wrong! The Oracle (aluminum) frame is different from other (steel) Nimbus frames. Despite using a 25.4mm seatpost, the Oracle frame uses the same 31.8mm seatpost collar (e.g. clamp) as my KH36.

Also, a little birdie told me a new kind of Quick Release clamp (developed by unicyclists for unicyclists) will be available from UDC by Christmas 2012 and it will come standard on high end unicycles (like the Oracle) going forward. I can't give away the secret but I can tell you that it will be "twice" as good. Enough (too much?) said.

scotthue · 2012-05-24, 11:53 PM

Quote:

Originally Posted by DavidHood

Heads up! I was wrong! The Oracle (aluminum) frame is different from other (steel) Nimbus frames. Despite using a 25.4mm seatpost, the Oracle frame uses the same 31.8mm seatpost collar (e.g. clamp) as my KH36.

Also, a little birdie told me a new kind of Quick Release clamp (developed by unicyclists for unicyclists) will be available from UDC by Christmas 2012 and it will come standard on high end unicycles (like the Oracle) going forward. I can't give away the secret but I can tell you that it will be "twice" as good. Enough (too much?) said.

I think too much said.

I would rather pay for a nice single lever clamp like a Salsa or Hope though.

Are you sure about that size? The other Alu Nimbus frames (the equinox and eclipse frames) are 30.6mm OD.

DavidHood · 2012-05-25, 12:11 AM

Quote:

Originally Posted by scotthue

Are you sure about that size?

At this point, I'm not SURE about anything and won't be until I take shipment of my new Salsa Flip-Lock 32.0 collar and try to slip it on my Oracle frame. All I know is that Josh from UDC told me (on the phone) to get the same one that I would get for my KH36. And, I know for a fact (from experience), that the Salsa Flip-Lock 28.6mm that I was using on my Nimbus Impulse does NOT fit my Oracle but it does fit my daughter's 20" Club.

I'm still blown away by the fact that my 26" Oracle uses a 25.4mm seatpost and an oversized (just exactly what size, I still cannot confirm) clamp. Why didn't they just use a 27.2mm seatpost?

If it sounds like I'm severely confused, it's because I am.

Nurse Ben · 2012-05-26, 01:49 PM

Hey gang, ID (inside dimension) is diffent than OD (outside dimension).

Seat posts use ID, 25.4 Nimbus aluminum and steel frames, 27.2 KH frames.

Seat post clamps use OD, 28.6 Nimbus steel frames, 32.0 KH frames.

The Oracle "may" share the KH OD, but check first. Josh told me last week end that the Oracle has the same ID as the Nimbus steel frames; makes switching parts easier and provides consistency across the "Nimbus line of products".

David, in the bike world there are many frame OD and ID differences, so much so that it is rare that two bikes can share products, esp across brands. I think you'll find that unicycling gear has far more crossover than any other gear intensive sport, so having only two seat post sizes is downright awesome!

You can buy an inexpensive slide caliper at Home Depot for $8

2011-09-09, 01:17 PM	#1
Mr_Brick Registered User Join Date: Apr 2007 Location: Santa Cruz Age: 22 Posts: 33	Quick Release Seatpost Clamp I have been riding my 24" muni longer distances recently(~10mi), and have noticed how much seat height makes a difference for different riding conditions and obstacles. I was wondering if anyone uses a quick release seat clamp on a muni, and if that is strong enough/small enough to be effective, but out of the way, etc. I know a lot of beginner unicycles use the quick release clamps, but I'm curious to see if there is a quick release option for a high-end uni. Regardless I need some padded shorts for the rubbing, but that's a whole other issue...

2011-09-09, 01:31 PM	#2
saskatchewanian ERIC P Join Date: Jan 2007 Location: Denare Beach, Saskatchewan, Canada Age: 27 Posts: 5,258	I use quick releases on almost all my unicycles, including my MUnis and road unicycles with long handles. A high end quick release like Salsa or Hope will hold your post nearly as strongly as a dual bolt clamp. __________________ My friends, love is better than anger. Hope is better than fear. Optimism is better than despair. So let us be loving, hopeful and optimistic. And we’ll change the world. - Jack Layton

2011-09-09, 08:18 PM	#4
bouin-bouin Didier Join Date: May 2008 Location: France in Europe (Le Chesnay - Yvelines) Age: 47 Posts: 339	I'm using Hope QR on my KH29 and 36 with dual cranks, perfect ! __________________ http://monocycle.info http://teamcdkmonocycle.blogspot.com/ MUNI KH26" & KH29" both with Oracle disc brake, ROAD KH36" with KH dsic on Spirit crank my goal : a 3 geared 29" to have only one uni for all kind of rides :-)

2012-05-23, 10:39 PM	#6
DavidHood Cokering rails2trails asphalt Join Date: Apr 2010 Location: Louisville Kentucky Age: 44 Posts: 541	I'm getting a couple of Hope Quick release seat post clamps the next time I order something from Chain Reaction Cycles and I wanted to double check with you guys to make sure I have the dimensions right. For my Nimbus Oracle I need a 28.6 OD For my KH36 I need a 31.8-32.0 OD Agreed? __________________ 36" KH/Schlumpf GUni FOSS tube, 2.25" Todd tire, 137 Spirit, Shadow, Slim 29" KH MUni 2.35" Hans Dampf, outboard disc, 165/137Spirit, NB Ghetto Flat Freeride 26" Nimbus Oracle MUni 2.35" HighRoller, inboard disc, 165/137Spirit, NB handle, Freeride

2012-05-24, 01:23 AM	#7
Nurse Ben XC Muni Join Date: Jul 2008 Location: Southeast USA Age: 47 Posts: 4,009	Back when we had a unicycling magazine, there was a "compression test" comparing seat post clamps. Lowest clamping pressures were the KH and Nimbus double clamps, highest pressures were with the Salsa and Hope QR clamps. I like Hope best, but they are hard to find, so Salsa works fine in anodized. I have them on all my unis, use them on rides to adjust for changes in terrain, leg fatigue, shoe differences, swapping unis with buddies, etc... Fixed clamps are so yesterday __________________ I dream of hamsters and elderberries

2011-09-09, 02:18 PM	#3
Mutaito Registered User Join Date: Nov 2008 Posts: 20	I originally used a QR on the 24x3 Cross Quax MUni of our unicycle club, and it work so good that I decided to put one even on my KH29" with dual hole cranks! Love it

2011-09-10, 12:50 AM	#5
dragonzfly Rob O'Brien, Sydney Join Date: Dec 2008 Location: Blaxland. Blue Mountains Age: 42 Posts: 134	I have a QR on everything except my 20 inch trials. Works like a charm, and it means I can adjust my muni etc on the fly.

2012-05-24, 03:50 AM	#9
hollywood Registered User Join Date: Jul 2007 Location: Puyallup, Wa Age: 53 Posts: 10	What size clamp would I need for a KH 26?

2012-05-26, 01:49 PM	#15
Nurse Ben XC Muni Join Date: Jul 2008 Location: Southeast USA Age: 47 Posts: 4,009	Hey gang, ID (inside dimension) is diffent than OD (outside dimension). Seat posts use ID, 25.4 Nimbus aluminum and steel frames, 27.2 KH frames. Seat post clamps use OD, 28.6 Nimbus steel frames, 32.0 KH frames. The Oracle "may" share the KH OD, but check first. Josh told me last week end that the Oracle has the same ID as the Nimbus steel frames; makes switching parts easier and provides consistency across the "Nimbus line of products". David, in the bike world there are many frame OD and ID differences, so much so that it is rare that two bikes can share products, esp across brands. I think you'll find that unicycling gear has far more crossover than any other gear intensive sport, so having only two seat post sizes is downright awesome! You can buy an inexpensive slide caliper at Home Depot for $8 __________________ I dream of hamsters and elderberries Last edited by Nurse Ben; 2012-05-26 at 01:55 PM.

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