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My First Trials Bike


BurlyBox

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i got my first trials bike on tuesday and its an Onza T-Pro 2005 and i bought it for £100 which i was told werent too bad. originally i got it and first just checked the frame for dents and cracks to see what state it was in and it wasnt too bad and i guess i didnt do too bad with the money i spent but i still need to get a few new parts for it.

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The complete bike

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Not too bad frame

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Dodgy quick release front wheel

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My nice amount of tread

Edited by BurlyBox
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I'd say that £100 was a bargain. Get the bottom bracket sorted, a helicoil in the maggie mounts and a few tweaks like a new chain an that'll be a great starter bike!

As for the quick release and front wheel I wouldn't worry too much, I've been running both my bikes with quick releases and the wheel should still be upto the job!

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I'd say that £100 was a bargain. Get the bottom bracket sorted, a helicoil in the maggie mounts and a few tweaks like a new chain an that'll be a great starter bike!

As for the quick release and front wheel I wouldn't worry too much, I've been running both my bikes with quick releases and the wheel should still be upto the job!

im gonna hopefully get some ISIS cranks and BB and sort the stuff that needs sorting and then il worry about the other stuff like rear tyre and chain and that. also ive just bought a new front wheel for £20 which was in good condition so i dont think its a too bad buy.

one more thing, whats a helicoil?

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im gonna hopefully get some ISIS cranks and BB and sort the stuff that needs sorting and then il worry about the other stuff like rear tyre and chain and that. also ive just bought a new front wheel for £20 which was in good condition so i dont think its a too bad buy.

one more thing, whats a helicoil?

Bargain for a £100 mate.

A helicoil looks a little like a spring. You drill out your f**ked thread and tap a new thread in the next size up, you then screw the helicoil into your new thread and you end up with a thread your original size.

Its also supposed to be stronger than the original thread. you can get the kits for under £20 on ebay.

i dont think the front wheel is an issue really, i would defo get a new chain if you like your face the way it is, a bb and some isis cranks wouldnt go a miss too.

If your gonna be riding natural i would also put the rear tyre high on your list.

Edited by Franksx2005
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Bargain for a £100 mate.

A helicoil looks a little like a spring. You drill out your f**ked thread and tap a new thread in the next size up, you then screw the helicoil into your new thread and you end up with a thread your original size.

Its also supposed to be stronger than the original thread. you can get the kits for under £20 on ebay.

i dont think the front wheel is an issue really, i would defo get a new chain if you like your face the way it is, a bb and some isis cranks wouldnt go a miss too.

If your gonna be riding natural i would also put the rear tyre high on your list.

my chain snapped on my bmx and made a mess of my leg when the pedal came round and got me so i see where your coming from about that. where would the helicoil go then on the bike? (this is probably a really silly question that everyone knows but me but ah well im learning)

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  • 3 weeks later...

basically i finally got the parts for the bike and went to my LBS and they said they'd fit it and so i was anxiously awaiting getting my bike back and riding it and i got a phonecall and they said that the last person to have the bike had cross-threaded the BB and that they had tried to fit the new one which didnt work. Then they tried to tap a new thread and nothing they tried would work and he then went on to say that the frame was useless and that no only was that thread useless but the part where the bashplate goes in was useless as that was cross-threaded and so he said im best off to go try to get my money back for the bike because to get a new frame it would cost as much as the bike was worth to fix and therefore it wasnt worth it. i contacted the seller of the bike and they said that they wanted to see it and claim that the damage wasnt there when they got it but his partner said they would try to give us back the money but they have no money and are expecting a baby in the next few days so its understandable that they have no money but i now have no bike as its useless to me so ive got my parts back that i bought and are working and i now need to get the money back and start looking for a new bike.

i wouldnt mind getting a 26" next as it would probably fit me better as i am 6' 2" but i dont know now because i've bought a new front wheel thats is great condition and cranks that are in great condition but they are for a 20" so ive got a problem although i could just sell em but after just buying them it seems a bit of a waste.

im not too happy after this problem and it has kinda put me off trials alltogether as its so far been alot of hassle but i do wanna do it. guess il hope i get my money back and start looking for another bike. i guess for all people that are looking to buy bikes the moral of this story is if a bike is ridiculously cheap for what it looks then it most likely has something wrong that you cant see and is going to be alot of hassle to solve.

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There are such things as thread less BB that you can use when the threads on the frame are damaged but not sure if you can get them in isis, also the bash plate thread should be an easy fix with a heli kit as it is a standard sized thread.

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naa they gave it back to me and i then took it to show the people that i bought it off and ive left it with them while they try to find a way of either sorting it or getting the money but this still makes me think what else may be wrong with it that i havent seen yet as on 3 different parts of the bike the thread has been worn and has wrecked it and thats only the parts that ive seen.

There are such things as thread less BB that you can use when the threads on the frame are damaged but not sure if you can get them in isis, also the bash plate thread should be an easy fix with a heli kit as it is a standard sized thread.

well i dont know what can be done really as ive asked the guy that looked at my bike and he said there was nothing he could do to fix it because it was that bad and also ive bought the cranks now too and theyre worth alot and are very light and so i dont want to get rid of them.

Edited by BurlyBox
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Stuff like brake mount threads can be helicoiled easily, I had to helicoil 2 brake mounts on a Zona stock frame I bought off here. That had a crack in the top tube as well but it wasn't a lost cause.

Are the cranks you've got isis or square taper??

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Stuff like brake mount threads can be helicoiled easily, I had to helicoil 2 brake mounts on a Zona stock frame I bought off here. That had a crack in the top tube as well but it wasn't a lost cause.

Are the cranks you've got isis or square taper??

its the thread on the brake lever (sorry i shoulda said earlier). also the cranks are isis

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Oh yeah I remember you saying about the lever now! If you keep looking I'm sure a mod frame will turn up on here pretty soon for under £50 and the Onza won't be a complete loss as you can just swap everything over from it onto a new frame. As for the brake just keep an eye out in the for sale, I've seen a few 04 magura's for sale in the last few weeks for very little money!

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the guy that looked at my bike has said that the only good thing on the bike that looked worth keeping was the brake pads as te rear magura doesnt work properly either and besides i would prefer to get the money back and just get a fully working bike so that i can just start riding without the extra unexpected cost.

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Id say get someone else to check it before saying its a complete loss. Ive had problems with bike shops when i first started trials, especially with maguras, and they can usually be bodged or fixed no problem. Or if not, someone on here must have an old onza frame theyll get rid of for little money!

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One batch of the T-Pro frames have an oversized BB shell (but only very slightly - not enough to notice). If you try and fit a 'normal' sized BB in then it strips the threads.

Sounds to me like your LBS doesn't know about this and has made a bit of a mess of it...

Your best bet is to get them to check the thread sizes on the two BBs, then if the old one is larger put the old BB back in and re-fit your old cranks. There should be enough thread left in the frame to do this.

We're not open again until Tuesday now, but if you want some more help just give me a call. Good luck!

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