STEVE-0 Posted April 16, 2005 Report Share Posted April 16, 2005 I should of asked this question so long ago but...oh well :( I've had my t-rex now from november last year and i want to know if anyone has had any problems with clearance?? Firstly i had orbita cranks with the tensile screw on bash ring with a 22t chainring and it didnt fit with a UN53 BB (127mm), which is advised, even by tartybikes. Then i bought a 20t chainring and it still didnt fit, so i made a BB spacer and moved the driveside over. THEN, it just fitted, JUST!! Now after 6 months i have decided to get rid of my hope bulb that keeps braking and convert to front freewheel, which will also get rid of my clearance problem. After taking the crank off i relised that the chainring didnt just fit, it DIDN'T FIT!!! :) I had a 2mm guage in my frame. Hope its not serious. Please could someone advise! Ok so now ive bought an ACS freewheel and im getting a stainless steel bash ring the same size as the coust bashring made for my orbita cranks and i've fixed up an old onza wheel. Ive already had to grind the tabs off the freewheel because IT didn't fit either and now i have about 2/3 mm left with the crank just pushed on, which should be alright. One last thing, when/if i break my ACS i might buy an white industries eno freewheel which i think is even bigger. Will that fit? How wide are they compared to an ACS? Has anyone had as much trouble as i have?????????? :( Sorry about the length of the post, i hope u will read it still. Thanks and thanks again :) Steve Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted April 17, 2005 Report Share Posted April 17, 2005 It sounds very much like the tapers on your cranks are stretched... We have never seen a problem with 127.5/128mm BB axles and a drive side spacer (i'm not sure the bit about the spacer is on the site, however... I shall update that now). I do also remember you PMing me at the time about this problem, to which I did reply with the correct solution... Either way, the yoke on the Rex is very chunky, I should think there won't be a problem. You should really have noticed a gouge in the frame a bit sooner though! To recap... 73x128mm BB, with a drive side spacer, will clear 22T chainrings (on all cranks, unless your tapers are a bit squiff) Hope thats of some help, Adam Quote Link to comment Share on other sites More sharing options...
Bionic Balls Posted April 17, 2005 Report Share Posted April 17, 2005 (edited) he bought the crank with the frame :) (well i did...went to supercycles myself :( , and accidentally bought a woodstock for myself..) i've been through similar...i've been using front freewheels for a few years now, first on megamo cranks (shimano fwheel), then tensiles and then an ENO...I've always had to grind the tabs off an i've been through square and isis combinations. Steve, rest assured- an eno will fit, mine was VERY similar in terms of fit :) that chainstay is beef :) adam EDIT: adam (ter other one) said a 73 x 128mm BB was suitable....well that's what i have for my tensiles, but steve is using a 68 x 127.5mm since that is the biggest for square tapers around...right? Edited April 17, 2005 by ad101 Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted April 17, 2005 Report Share Posted April 17, 2005 The largest square taper (decent) BB available comes with a 127.5mm axle, correct. However, using a 73mm shell BB instead of a 68mm, when combined with a BB spacer, shifts everything across to the right a small amount - which gives enoguh clearance. Quote Link to comment Share on other sites More sharing options...
Bionic Balls Posted April 17, 2005 Report Share Posted April 17, 2005 where can you get a 73 x 127.5mm square taper BB? the biggest i could ever find in 73mm shell was 122.5mm (bikedock).....i'm not sure they actually make them anymore :( cheers, adam Quote Link to comment Share on other sites More sharing options...
gazmaz03 Posted April 17, 2005 Report Share Posted April 17, 2005 where can you get a 73 x 127.5mm square taper BB? the biggest i could ever find in 73mm shell was 122.5mm (bikedock).....i'm not sure they actually make them anymore :( cheers, adam ← I am sure they sell them at supercycles thats were I brought mine from, well i went in for them to put myBB in and they told me that i had the wrong size so they put me the right size in which was a 73x127.5mm square taper BB. ( Ow yeah i had a new onza t-rex) Give them a ring 0115 941 5970 Gaz :) Quote Link to comment Share on other sites More sharing options...
Mark W Posted April 17, 2005 Report Share Posted April 17, 2005 I should of asked this question so long ago but...oh well :) I've had my t-rex now from november last year and i want to know if anyone has had any problems with clearance?? Firstly i had orbita cranks with the tensile screw on bash ring with a 22t chainring and it didnt fit with a UN53 BB (127mm), which is advised, even by tartybikes. Then i bought a 20t chainring and it still didnt fit, so i made a BB spacer and moved the driveside over. THEN, it just fitted, JUST!! Now after 6 months i have decided to get rid of my hope bulb that keeps braking and convert to front freewheel, which will also get rid of my clearance problem. After taking the crank off i relised that the chainring didnt just fit, it DIDN'T FIT!!! :) I had a 2mm guage in my frame. Hope its not serious. Please could someone advise! Ok so now ive bought an ACS freewheel and im getting a stainless steel bash ring the same size as the coust bashring made for my orbita cranks and i've fixed up an old onza wheel. Ive already had to grind the tabs off the freewheel because IT didn't fit either and now i have about 2/3 mm left with the crank just pushed on, which should be alright. One last thing, when/if i break my ACS i might buy an white industries eno freewheel which i think is even bigger. Will that fit? How wide are they compared to an ACS? Has anyone had as much trouble as i have?????????? :( Sorry about the length of the post, i hope u will read it still. Thanks and thanks again :) Steve ← Hey Steve, Sounds like the problem I had on my mod! Basically, the tapers had stretched to buggery on my Muscleman crank (same as the Orbita, but different length?), so the crank was sitting further in on the spindle, meaning I could only run a Dicta freewheel 'cos that was the thinnest available... The Eno is thinner than an ACS; the tabs are more slender (hmm, grammar), and it's just thinner altogether. It doesn't have the same big bit on the inside of the freewheel by the tabs that the ACS has, and well, it's just thinner :D There's just less to it, really. The pawls and ratchet part of the freewheel are pretty narrow, and the sealed bearings are also pretty narrow. Mark Quote Link to comment Share on other sites More sharing options...
STEVE-0 Posted April 17, 2005 Author Report Share Posted April 17, 2005 Well as Ad101 kindly said for me, 'i bought the crank when i bought the frame cause my old one was screwed'. So i pretty sure this hasn't alreadly happened to the crank because it does look alright, although the another crank has done this but ive have had it way, way longer! Tartybikes sell the UN53 BB dont they adam? in both sizes! About the gauge: I did find it earlier but there was anything i could do about it really, i should of bent the chainring over abit but couldn't be arsed! :P .... :) shit. Mark are you sure that they are thinner, i vividly remember the whole body of the ENO being really wide, i there more than 1 model? Quote Link to comment Share on other sites More sharing options...
Mark W Posted April 17, 2005 Report Share Posted April 17, 2005 Nah, it's thinner than the Claw? I'll take a pic tomorrow when it's not ultra dark and stormy outside, but yeah, I couldn't fit an unground Claw on my cranks, but I could comfortably fit an Eno... I wouldn't call it really wide though :P There is more than one model; Eno Trials and Eno Singlespeed. Quote Link to comment Share on other sites More sharing options...
tank_rider Posted April 17, 2005 Report Share Posted April 17, 2005 i am currently running a 68x127.5 BB on a borrow rex frame and it fits my burns with a 22t ring without any problems. Quote Link to comment Share on other sites More sharing options...
STEVE-0 Posted April 17, 2005 Author Report Share Posted April 17, 2005 Cheers mark, so what did you use the trials or single speed??? This is the thing, i've seen loads of t-rex's with middleburns and tensiles. But never orbitas with a tensile bashring. Is there something different about them?? Size?? Quote Link to comment Share on other sites More sharing options...
tank_rider Posted April 17, 2005 Report Share Posted April 17, 2005 Cheers mark, so what did you use the trials or single speed??? This is the thing, i've seen loads of t-rex's with middleburns and tensiles. But never orbitas with a tensile bashring. Is there something different about them?? Size?? ← im guessing the position of the taper with respect to the threaded part is different. Either that or they are made from a cheesier material which deforms more easily when tightened onto the bb moving the whole lot closer to the bb. For example my old powerpoos and dewhores to a certain extent ended up a lot further onto the tapers once they had bedded in and been repeatedly tightened when compared to my burns which are made from a harder material which deforms less. Quote Link to comment Share on other sites More sharing options...
Mark W Posted April 18, 2005 Report Share Posted April 18, 2005 Cheers mark, so what did you use the trials or single speed??? This is the thing, i've seen loads of t-rex's with middleburns and tensiles. But never orbitas with a tensile bashring. Is there something different about them?? Size?? ← Trials for me :) 72-lovely-engagement-points.com :) The Orbitas are basically longer Muscleman cranks, and I used the MM's, so yeah, somebody did! I guess the difference could just be between the splined and square taper cranks, really. 'cos with my new Tensiles (:P), the BB's a 68x127.5, so it's got those big kinda spacer bits on the spindle to stop the cranks going in further; this means you theoretically can't OVERtighten it like you can with square taper cranks, so it'll always be in the right place, theoretically. I'll get the pics tonight :P Mark Quote Link to comment Share on other sites More sharing options...
fifty pence Posted April 18, 2005 Report Share Posted April 18, 2005 I should of asked this question so long ago but...oh well :P I've had my t-rex now from november last year and i want to know if anyone has had any problems with clearance?? Firstly i had orbita cranks with the tensile screw on bash ring with a 22t chainring and it didnt fit with a UN53 BB (127mm), which is advised, even by tartybikes. Then i bought a 20t chainring and it still didnt fit, so i made a BB spacer and moved the driveside over. THEN, it just fitted, JUST!! Now after 6 months i have decided to get rid of my hope bulb that keeps braking and convert to front freewheel, which will also get rid of my clearance problem. After taking the crank off i relised that the chainring didnt just fit, it DIDN'T FIT!!! :) I had a 2mm guage in my frame. Hope its not serious. Please could someone advise! Ok so now ive bought an ACS freewheel and im getting a stainless steel bash ring the same size as the coust bashring made for my orbita cranks and i've fixed up an old onza wheel. Ive already had to grind the tabs off the freewheel because IT didn't fit either and now i have about 2/3 mm left with the crank just pushed on, which should be alright. One last thing, when/if i break my ACS i might buy an white industries eno freewheel which i think is even bigger. Will that fit? How wide are they compared to an ACS? Has anyone had as much trouble as i have?????????? :D Sorry about the length of the post, i hope u will read it still. Thanks and thanks again :P Steve ← Sorry i know that i have come into this topic a little late,however i have a friend that i used to ride with and he had the exact same problem with his T-Rex but he wasn't so subtel with his and he just took a grinder to the frame :) :P Quote Link to comment Share on other sites More sharing options...
Bionic Balls Posted April 18, 2005 Report Share Posted April 18, 2005 which bit did he grind? adam Quote Link to comment Share on other sites More sharing options...
Mark W Posted April 18, 2005 Report Share Posted April 18, 2005 Hey Steve, Measured 'em 'cos my camera's out of battery. ACS Claw freewheel body: 15mm ACS Claw extractor tabs: 2mm Eno freewheel body: 16mm Eno tabs: 1mm So yeah, almost exactly the same (Y) Mark P.S. The Eno seemed to fit in better... Quote Link to comment Share on other sites More sharing options...
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