View Full Version : Trials STP
Could someone please post up any pics of their trials STPs if they have any
I am getting into trials and i have one so i wanna see the setup so i can ride something similar until i get a new frame
cheers :)
Binaural
03-09-2006, 06:59 PM
Heheh, trials is awesome fun. I don't have a trials STP but I do have a somewhat related street frame for trials, should be fine. When I first got into trials I had to use a little hardtail XC bike, so you can do it on anything :)
The basics of setting up a trials bike still apply - high and wide bars, bottomed seat, grippiest pedals you can find, super low tyre pressures for more boost, murderously sudden brakes.
hubbie
03-09-2006, 07:44 PM
it's gonna be tough finding trials specific STP's considering the lack of v-brake mounts on the aussie models (US come with v-brake mounts), which means any serious Trials is going to snap the brake-mount. should be ok for lightweight trials.
If you're serious about setting it up solely for trials, you should start with some lightweight but strong parts. losing the weight while maintaining strength is going to do you wonders
fleshbone
03-09-2006, 07:59 PM
i do trials on my stp.i put my street tires on,have bmx tire pressure.i keep the seat at knee pinch hight for one hand tail taps and stuff some times drop my travel so it's easy to hop around(roughly 120mm,most time keep at 140mm.my preferance).everything else is pretty much normal for a everyday riding bike.just look at Jeff Lenosky-rides stp,has seat high for pinching when doing barspins,disc brakes,some of his bikes are single speed(not a must).
it will come down to your skill.my bike has been approved by a dude that competes in trials comps too.
allstar
04-09-2006, 02:22 PM
it's gonna be tough finding trials specific STP's considering the lack of v-brake mounts on the aussie models (US come with v-brake mounts), which means any serious Trials is going to snap the brake-mount
im not into trials at all and dont know anything about it, and i've been wondering why trials riders use v-brakes on the back.
how/why will the brake mounts snap?
Mattydv
04-09-2006, 04:31 PM
There was a thread on it a few months ago I tried searching but couldn't find it. Basically the pressure put on the back disc brake snaps the connection between the cable and the bit that holds the pads in. (Someone else might want to explain a bit more in-depth)
hubbie
04-09-2006, 05:13 PM
just look at Jeff Lenosky-rides stp,some of his bikes are single speed(not a must).
see below
(US come with v-brake mounts)
US models come with V-brakes. and generally he rides gears
There was a thread on it a few months ago I tried searching but couldn't find it. Basically the pressure put on the back disc brake snaps the connection between the cable and the bit that holds the pads in. (Someone else might want to explain a bit more in-depth)
actually, often the snappage occurs not with cable brakes. the snap is the actual brake-caliper mount snapping, as the mount is gussetted to take the pressure when wheels are rolling forwards (ie the disc is spinning towards the frame). when riding trials, you often hop backwards, which pulls the caliper away from the frame, where there is no strengthening. the mount simply snaps off
yeah thats because the mount has extreme pressure put on it in a rotational way from sudden and constant lock up so eventually it will just completely give way, especially on an aluminium frame cus al. is much weaker
yeah i have shithouse brakes so i aint worried bout snapping the disc mounts until i buy a new frame and v for the back
dang
no setups, i just purely wanted to see someone's stp
yeah i am gradually getting a good setup and on my way to learning pedal kicks, i can already ratchet once and sometimes nearly twice so im close!
Holzfella
05-09-2006, 06:22 PM
Not really on topic but somehow related as most trials frames are light;
Does anyone have an exact weight on an stp frame?
ss-stp1'06
15-09-2006, 10:45 PM
this is not related to anything aswell...but i was wondering why trials riders dont just have an 8 inch on the rear? wouldnt it have a very similar effect?
djdom
16-09-2006, 02:13 PM
this is not related to anything aswell...but i was wondering why trials riders dont just have an 8 inch on the rear? wouldnt it have a very similar effect?
try reading before posting
marty..........
dont thread-jack
ss-stp1'06
17-09-2006, 01:15 PM
haha...well...i dont know...i was just interested...
THE YETI
17-09-2006, 07:49 PM
[Quote removed by demo man]
Dude, you should get some actual posts up and use the (FOR SALE) section. Don't hi-jack peoples threads. Im sure you will get away with it (being your first post). But seriously, don't
Ska-quatch
17-09-2006, 08:01 PM
why hasnt anyone designed a trails specific frame with strengthened disk mounts to cope with rotational forces in both directions? surely wouldnt be tht hard....
owen#66
17-09-2006, 08:07 PM
hey this is to yeti im sorry for that wont happen again :D
why hasnt anyone designed a trails specific frame with strengthened disk mounts to cope with rotational forces in both directions? surely wouldnt be tht hard....
probably because its easier to use rim brakes
Reptileman
17-09-2006, 09:25 PM
They have made a rear disc specific frame, the brake caliper mounts between the chainstay and the one that goes from the drop-out to the top tube. Not sure what its called but i can probably scrape up a photo if you cant find one yourself.
And ska-quatch, i thinks its TRIALS.....not trails! ;)
They have made a rear disc specific frame, the brake caliper mounts between the chainstay and the one that goes from the drop-out to the top tube. Not sure what its called but i can probably scrape up a photo if you cant find one yourself.
And ska-quatch, i thinks its TRIALS.....not trails! ;)
the tube from the rear axel to the top tube is the seatstay.
there have been a number of disc brake designs for trials bikes, check out the attachment fo an extreem example. they're not so much for competion as street trials wheich has kind of blured into technical street.
Hope make a trials disc brake, I think normal discs don't work well at low speeds, I run 8 inch saints with resin pads on my street bike and they don't come close to an Archrival or a HS33.
with snapping of the disc tabs, it because the welded on ones are designed to take compression loads. Roll backs create a tension load, this is only really a problem on bikes where the disc brakes tabs are welded to the seat stay. If the disc tabs ate part of the dropout there shouldn't be any dramas.
^^^^ looks like some strange prototype!
This is a typical dual disc trials bike. The dual disc bikes are still not very popular with most people prefering V's of a Magura HS-33 hydraulic rim brake. However the guys with dual discs do seem to be liking them very much.
hardtail free rider
18-09-2006, 04:30 PM
why do you need to see what other peoples bikes look like in order to build your own up. surely it would be more benificial to customize the build for your own style.
i would start by getting some good brakes; sticky pads, good cables (if they are mech), and nice adj levers (avid speed dials). then maybe rigids if you got some money, and stronger wheels.
with the wheels, make sure you get good strong hubs with plenty of engagement points for the rear.
theres heaps of reasons why trials riders dont run disc on the rear. they are heavier, the frame could break or needs to be strengthened (which adds weight), some just dont like the feel of them.
for trials the rear brake is the most important, it needs to be reliable and snap on when you want to. disc generally dont work like that. they have modulation to enable you to slow down quickly. and can be held on for long periods of time without losing power (these are all dh orientated uses). there are trials specif breaks and they do work well which is why 80% of riders these days use them on the front, but for the rear, good quality v's (and hydro v's) are still the better option.
when people say that rear discs break, it can mean a lot of things and this depends on the type of brake and manifacturer. more often then not the caliper will crack or come appart. this is because you end up pulling the brake on soo tightly (over long periods) that the pressure inside the caliper is too great and something fails. this could be the hose, the caliper, or the seals. also the mounts do tend to snap on some frame but that has been covered already.
-dan
Big_Chief
18-09-2006, 04:54 PM
check out the size of that rear brake at the top of the page :eek: that must give a hell of alot of power
ss-stp1'06
23-09-2006, 08:54 PM
ill hav one of those disks at the top of the page:D imagion if it was on the front...ohhh the stoppies...
u resurected an old thread.................
that disc is crazy i tells ya C.R.A.Z.Y.
but how could the caliper fit around it? it looks as if the mounts to the rim are attached directly to the disc edge (or watever you call it) so the disc wouldnt be able to rotate without hitting a mount
but how could the caliper fit around it? it looks as if the mounts to the rim are attached directly to the disc edge (or watever you call it) so the disc wouldnt be able to rotate without hitting a mount
The calliper runs on the inside of the disc
ss-stp1'06
24-09-2006, 09:09 AM
but how could the caliper fit around it?
The calliper runs on the inside of the disc
that is why the hose for the hydrolics goes into the caliper from the rear...its upside down...then back to front:p ...i think:confused:
ss-stp1'06
24-09-2006, 07:02 PM
my bad....
how embarrassing!:p
dueliepride
24-09-2006, 07:28 PM
going off basic brake design: the more surface area on the brake the better the braking so... why not use a wide disc like a motobike
going off basic brake design: the more surface area on the brake the better the braking so... why not use a wide disc like a motobike
There are a few significantly mor important things to get right on a disc brake first;
- simple leverage, ie 8" rotor has 33% more leverage than 6"
- getting the balance of MC piston vs Caliper piston size right
- minimizing power loss through better quality lines.
also motorbikes are heavier and travel much faster so the need to be able to disipate a lot more heat.
If you want to know more, there have been whole threads about this before, do a search for some of them.
wow.........technical
oh snap greg u just got cut, do u need a bandaid?
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