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Echo Urban ISIS

Product code: 11117

From £37.49 to £41.67RRP: £41.67(Save up to 10%)

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Echo Urban ISIS

Steel axle with new style taper washers
Steel axle with new style taper washers (Fitted to frame, but unused)

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- New system ISIS Bottom Bracket from Echo. with 124mm axle.
- Uses press-fit bearings, like the Spanish BB system used in BMX.
- Uses a larger bearing than traditional ISIS BBs, making it spin smoother for longer.
- Only suitable for use with Echo, Adamant and Czar 24" frames, plus 2011 Echo and ZOO! trials frames with press in bearing system (without threads).
- Steel axle is tough and durable.
- Now supplied with tapered washers as found on splined Echo freewheel and crank systems.
- Comes complete with Black Echo SL Crank Bolts, bearings, spacers and spindle.
- Complete weight including crank bolts: 267g (Steel)

As used by



Is this bb strong compaired to a euro bb?

Posted by Peter

Reply from TartyBikes

Hi Peter!
The axle diameter is the same as most Euro BBs, and the bearing themselves are larger, so it should be just as strong as if not stronger than most Euro BBs.
That will depend on the specific type of Euro BB though, e.g. whether the bearings are inboard or outboard, and the specific axle size (some Euro BBs are designed for 19mm axles, others for 22mm).

Steven Pap

Hee tartybikes' I have an Specialized P1, Try to make is custom as possible' Will this bb fit into the frame and what kind of cranks i need' Greetz

Posted by Steven Pap

Reply from TartyBikes

Hi Steven - Specialized appear to have made many different variations of the P1, so we couldn't say for sure sorry. If your P1 has a Spanish BB (press-fit bearings with an outer diameter of 37mm), and the bearing seats inside the frame are spaced at 48mm, then this BB will fit. If not then it wouldn't be possible to use it sorry. Thanks, Mark

Martin Allen

Hi Would this bottom bracket fit a 20" because color frame, the one that came out measures 124mm long but thats all i know as the bearing are totally destroyed. the cranks are made by echo but not sure of model. Sorry thats all i have to go off. Cheers Martin

Posted by Martin Allen

Reply from TartyBikes

Hi Martin - This BB should fit your Because frame fine, as would the Trialtech Sport Spanish BB (which is useful if you needed some additional crank or freewheel clearance). Thanks, Mark

Sam Righton

will this fit on the echo lite sl 2013 frame?

Posted by Sam Righton

Reply from TartyBikes

Hi Sam - yes, this will fit in your frame just fine. Thanks, Flipp.


Bearing size?

Posted by OH BONG GEUN

Reply from TartyBikes

Hi Geun - thanks for your question. The outside diameter of the bearing is 37mm, inside diameter is 22mm and with is 9mm. Hope that helps! Thanks, Flipp.


I can find with this hub axle and bearings from 145mm long 41,3mm ??

Posted by Stefano

Reply from TartyBikes

Hi Stefano - thanks for your question. The axle is shorter than that at 124mm, and the bearings have a 37mm diameter. Hope that helps. Thanks, Flipp.


Is it possible to convert a thread bottom bracket to a push fit bottom bracket

Posted by Rick

Reply from TartyBikes

Hi Rick - thanks for your question. Unfortunately that's not possible as the bearings have a larger diameter than the threads. Thanks, Flipp.


I have a spanish BB installed in one of my echo frames and I'd like to know the best to remove it.Without having to buy a special removal tool,I was hoping you'd could tell me another way.

Posted by Bobby

Reply from TartyBikes

Hi Bobby - it may sound a little barbaric, but you just need to hit it. If you have a rubber/plastic ended mallet, just hit one end of the axle and the opposing bearing will pop out the frame. If you don't, then putting a block of wood on the end of the axle and hitting that with a regular hammer works just as well. They can sometimes get pretty wedged in so it might take quite a firm hit to remove the bearing, so start gentle and hit it gradually harder. Thanks, Flipp.


Hi do you guys know if this bb would fit a 24-7 slacker, and would I be able to mount dmr crisis cranks to it?

Posted by brett

Reply from TartyBikes

Hi Brett - those cranks would fit on this BB axle though it will not fit that frame. These a "Spanish" style BB, your frame will need a "Mid" BB (2010 onwards. If it's an earlier model, we think you will need an "American" style BB, though are not too sure on that one). Hope that helps. Thanks, Flipp.

John Chadbourne

Best way to press these in ? We have a 50ton press for wheel bearing's n the such at work but im wondering if a vice is a softer approach haha! Any advice would be much appreciated!

Posted by John Chadbourne

Reply from TartyBikes

Hi John - there is a specific tool available if you prefer to do things that way, but we find the easiest way of fitting them without that is to just use a vice as you said. The first side obviously goes in without issue, but because you need to have the axle in place for the other side, you can place a socket over the end which will let you press the bearing in around the axle. Hope that helps! Thanks, Flipp.


Is it possible to replace the bearings in these? Do you have the bearings in stock?

Posted by Steven

Reply from TartyBikes

Hi Steven - We sell upgrade bearings for the Echo BBs here: http://www.tartybikes.co.uk/bottom_bracket_spares/flybikes_spanish_bb_bearings/c103p11970.html Thanks, Mark

raimundo zunino

hi, i have this bottom bracket, but in my country no are many trials riders and products, so i want to use mtb cranks with it. do you know if the inspired element's cranks( hussefelt truvativ) fit in this bottom bracket? if it's not, can you ask me some crank that fit in it? many thanks

Posted by raimundo zunino

Reply from TartyBikes

Hello - The Truvativ cranks will only work with the Truvativ bottom bracket, sorry! Any of the ISIS cranks we sell on our website will fit the Echo Urban ISIS bottom bracket. Thanks, Mark

yoon lee

Can i use this bb with Trialtech Sport Forged 175mm ISIS, Silver ?

Posted by yoon lee

Reply from TartyBikes

Hi Yoon - Those cranks will fit on this BB fine. As long as you have the correct frame to use the Urban ISIS BB then I can't see you having any problems! Thanks, Mark


how thick is the spindle

Posted by Nazarij

Reply from TartyBikes

Hello - This BB uses an M15 spindle. Thanks, Mark


Hi will this BB fit the zoo lynx 09 frame? cheers

Posted by derek

Reply from TartyBikes

Hi Derek - You'd need a 'normal' ISIS BB to fit the Lynx frame, as this only fits Echo frames with a Spanish BB system (e.g. the 2011 Echo and ZOO! frames). Thanks, Mark


Hello, I'd like to ask about bearings dimensions and is it possible to buy only bearings? Best Regards

Posted by Przemek

Reply from TartyBikes

Hello - The OD is 37mm, and the bearing width is 10mm. The ID should be around 22.2mm. Thanks, Mark

joakim ødegård

hello, I wondered if you would let me know the geometry on the bearings, and all the dimensions of it. And if it would fit if I sputtered away the threads? Thanks, Joakim

Posted by joakim ødegård

Reply from TartyBikes

Hi Joakim, The bearings are 37mm external size, they will not fit in a normal frame. Thanks, Adam


I have a NS Capital 2 Frame with a Spanish BB just wanted to know will it fit ?

Posted by bobby

Reply from TartyBikes

Hi Bobby, The bearings will fit in your frame fine, but the spacing of your bearings is more important - because the Echo BB doesn't use a tube spacer like a normal Spanish BB you'll need a BB shell with a 48mm gap between the bearing seats. Thanks, Mark


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