Viewing 32 posts - 1 through 32 (of 32 total)
  • Details of new Hope Tech 4 lever
  • Ben_Haworth
    Full Member

    All new Hope Tech 4 is intended to offer increased power but also delivers that power consistently from the moment the lever is pulled.

    By ben_haworth

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    Details of new Hope Tech 4 lever

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    CalamityJames
    Full Member

    Currently on Tech 3/ E4 combo and love them. I understand the gains must be due to the lever length, but these look like four finger touring brakes. Would be interested if the levers were shorter…

    dyna-ti
    Full Member

    Would be interested if the levers were shorter…

    They might be compatible with other Tech 3 blades, though knowing Hope these days probably not. But maybe.

    It actually looks the ideal for me on the ebike, and maybe thats also where they’re going with these. Coupled with the E4 or V4 calipers.

    ryanmart96
    Free Member

    Joe Barnes did a bike check recently and he showed how Hope had made him a custom level which closer resembled the tech3. I’d like to know if the new pistons in the calliper are compatible with current E4s.

    Onzadog
    Free Member

    Not just Hope, but where does everyone making brakes keep finding this extra power from? Surely distance X force at the lever = distance X force at the caliper. I don’t imagine the losses in the system are significant. The only way to get more power (reduce lever pull effort) is to increase lever throw and/or reduce required pad throw (by reducing pad clearance or funky servowave type gadgets).

    julians
    Full Member

    ignore – you said increase lever throw -not lever length

    Onzadog
    Free Member

    Ignored 😉

    dyna-ti
    Full Member

    Not just Hope, but where does everyone making brakes keep finding this extra power from?

    I think Hoe have made the 15% extra power claim over the last 7 changes to their braking systems 😆

    C2’s rulz

    Rubber_Buccaneer
    Full Member

    the gains must be due to the lever length

    Lever length, revised cam position and narrower piston in the master cylinder according to the pink site

    lcj
    Free Member

    Is it just me that can’t unsee the channel 4 logo on the reservoir cap?

    fahzure
    Full Member

    Looks like the master cylinder/cap will finally be able to be easily positioned level to the ground, making bleeds easier.

    cultsdave
    Free Member

    Is it just me that can’t unsee the channel 4 logo on the reservoir cap?

    Only now you said it!

    leegee
    Full Member

    Is there any indication of when the levers will be available separately?

    Onzadog
    Free Member

    Available in 31.8 and 35mm due to have far inboard you need to mount them.

    Daffy
    Full Member

    Is the blade from the pivot to the tip actually any longer than say a Trickstuff Maxima? It maybe looks longer due to the BPC and reach adjust being placed after the pivot, but is it actually longer? I know it’s longer than a Tech 3, but…in comparison to other modern brakes without a servo?

    Cougar
    Full Member

    “It’s a new brake lever!” – meh.

    “It comes in sparkly colours” – wait, no, I’m in!

    “And here’s the price” – fffffffffffuuuuu…

    Cougar
    Full Member

    Surely distance X force at the lever = distance X force at the caliper.

    That’s not how pressure works.

    You’re having a barbecue and you invite your semi-pro rugby player mate round with his petite supermodel girlfriend. He’s wearing trainers, she’s in stilettos, which one is going to make the biggest mess of your lawn?

    dove1
    Full Member

    Never mind new levers. Where are the old stock Tech 3 being sold off cheap?

    kimbers
    Full Member

    So 30% more power

    apparently 20% from redesigned levers and 10% comrs from organic race pads- so a cheap way to upgrade tech3

    DickBarton
    Full Member

    Would the tech 3 levers work with a SRAM code caliper? I really like my code brakes but the feel at the lever has too much lever throw…I’ve adjust the rsc lever but still not got it adjusted enough as I like a short lever throw.

    Would the tech 3 work? I had these previously and loved the levers as they were properly adjustable.

    blast
    Free Member

    My Sons running hope xc levers and guide calipers so can’t see why not..

    robertajobb
    Full Member

    Depends on who’s packing down with them

    docgeoffyjones
    Full Member

    You’re having a barbecue and you invite your semi-pro rugby player mate round with his petite supermodel girlfriend. He’s wearing trainers, she’s in stilettos, which one is going to make the biggest mess of your lawn?

    Be a nice host and let them use the toilet?

    Onzadog
    Free Member

    That’s not how pressure works.

    You’re having a barbecue and you invite your semi-pro rugby player mate round with his petite supermodel girlfriend. He’s wearing trainers, she’s in stilettos, which one is going to make the biggest mess of your lawn?

    The hydraulics are just a mechanism for transfering the mechanical advantage.

    What do you think the pressure difference is between the hydraulic fluid just behind the master cylinder piston and that just behind the caliper piston?

    zerocool
    Full Member

    @Cougar, depends if he’s going to start a scrum

    spacebutler
    Free Member

    when testing have a look at calliper flex? as i have a set of v4 and you can see the calliper flex and bulge when you apply the brakes and squeeze. you will find that is where a lot of brake power is lost.

    endomick
    Free Member

    Evocycles have some tech3 discounts, its weird how the press haven’t had some samples to verify the power claim before public release, I wanna see the underside of the lever for shifter adapter set up.

    argee
    Full Member

    Will be interesting to see how they play against the Tech 3s, with a stated 20% increase in power due to the increase in pressure, that’ll change the modulation a bit, if the pads are adding 10% i’d expect to see some data of that with the Tech 3s as well?

    Think it’ll be a few more years until i try Hope again, not out of anything bad, i just like 1 finger levers and brakes, so have pretty much been Shimano or Magura the last 5 years.

    zx970
    Full Member

    I thought the fashion police banned purple many years ago?

    euain
    Full Member

    That’s not how pressure works.

    It is when you link it together with geometry.
    Volume displaced is area of piston x travel.
    Pressure is force / area of piston.

    So, with the same calliper, you can increase braking force by increasing pressure, so reduce area of the master cylinder piston. But you need to displace the same volume to engage the pads on the disc surface so you need to move the piston at the master cylinder further.

    cloggy
    Full Member

    I love it when folks display their ignorance. I’ve done it myself.

    submarined
    Free Member

    I’d like to know if the new pistons in the calliper are compatible with current E4s.

    I asked them this, they said they are backwards compatible. So new e4/v4/x2 pistons fit their respective previous generations.

Viewing 32 posts - 1 through 32 (of 32 total)

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