The ever Present Mr Wilson from Progressive bikes has just sent us some new info ..
Chumba Racing VF2 & XCL frame and Cane Creek Double barrel promotion.
Following on from the success of our rolling chassis kits with the Chumba VF2 and XCL frames we are now able to offer the excellent Cane Creek Double Barrel (CCDB) rear shock as an upgrade over the existing Fox RP23 shock.
Given the linear nature of the VF2’s and XCL’s leverage ratio curve relative to other bikes in its class (although technically it is regressive and slightly progressive towards bottom out), the linkage will reflect a shock’s tuning very closely. This means, if you tune up the low speed compression, you will immediately feel this throughout the VF2 linkage’s travel without varying leverage rates from the linkage interfering with what you want the shock to do.
This you have the advantage to really custom tailor your Double Barrel to how you want it to perform at low speeds or high speeds, and the linkage will remain neutral to accept your change.
You can buy the VF2 frame only for £1599 or for a limited time only you can have a VF2 with a CCDB and spring matched to your weight for £1750, that’s a £150 upgrade charge on a shock usually costing over £600!
The XCL frame is available with the same excellent shock for £1450, again just a £150 upgrade charge for the CCDB!
You get a choice of frame sizes and colours and each CCDB will have a spring matched to your weight and some base guidelines for setting up the shock.
See our web site at http://www.progressive-bikes.co.uk/ for details .
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Must not spend money. Must not spend money. Must not spend money.
*wavers*
Well done Mr. Wilson for not trying to rip people off. Orange want an additional £400 when you upgrade from a RP23 to a CCDB.
Transcend geographic boundaries?
very nice looking bikes mmmmmm
“This means, if you tune up the low speed compression, you will immediately feel this throughout the VF2 linkage’s travel without varying leverage rates from the linkage interfering with what you want the shock to do.”
More bike bullshit…
do other shocks vary leverage rates?
Thanks Singletrack for just pushing out the BULL
crackhead i think you need to re read what it says. It is not saying the shock varies linkage rates but that the linear path of the VF2 frame means it is easier to tune the shock to do what you want it to do without the frames inherent leverage rate having such an effect on what you have asked the shock to do.
Si, is that not the case with any coil shock with either rebound or compresiion damping?
Was the frame not designed around an air shock with very different characteristics?
Of course other shocks with rebound or compression adjustment will have similar effects, however very few shocks have the range of adjustment or indeed quality of control as the CCDB does, and due to the pretty linear nature of the VF2’s suspension curve throughout its travel , these adjustments are more noticable.
The frame was designed around an air shock and to be linear in it’s travel, something Chumba have done throughout its history, it just happens that it also works pretty well with a good coil shock.