Hi Derek,
That's reassuring. I'm not so keen on bending the stays if it's avoidable. As Marcus says, if bending 10mm you would probably need to start realigning the dropouts too. I would have to find an expert in that case I think.
Best wishes, Mike Kelly London UK
On 23 April 2010 15:53, Derek Athey <devondirect@googlemail.com> wrote:
> Hi Mike
>
> Thanks for the welcome.
>
> What you want to achieve is not really a problem in my view. If the rear
> drop out spacing is already 120mm, then you will only need to take it out to
> 126mm for 7/8 speed. I would suggest 7 is the best number for what you want
> to do. I wouldn't think you even need to 'cold set' it, the 'spring in the
> chain/seat stays would give you an extra 6 mm without any stressing of the
> frame or need for re-alignment checks.
>
> I've done this many times for 4/5 speed set-ups on period cycles. Each to
> their own as to correct period set-ups! As your proposed purchase has
> already been altered it doesn't really matter that much anyway. If the frame
> is what you are after that is all that matters.
>
> Regards
> Derek Athey
> Honiton, Devon UK
>
> On Fri, Apr 23, 2010 at 12:36 PM, Mike Kelly <downlode@gmail.com> wrote:
>
>> Hi John and Derek,
>> Many thanks for your replies! (Derek I'm new here myself - first post!)
>> It's good to know that this is possible in theory.
>> If I go for the bike and win it I will definitely follow up with you.
>> I am indeed based in the UK - London.
>>
>> I'm also told that there's 120mm between the rear drop-outs. I'm guessing
>> that if I wanted to fit a 7 or 8 speed cassette I would have to "cold-set"
>> the frame, i.e. bend the rear stays apart? Is this common practice or should
>> I really be looking for a different frame if I want to accomodate that
>> number of gears? (Sorry if this is not in the spirit of maintaining the
>> original vintage specs.)
>>
>> Best wishes,
>> Mike
>>
>>
>>
>>
>> On 23 April 2010 12:21, Derek Athey <devondirect@googlemail.com> wrote:
>>
>>> Hello Mike
>>>
>>> As a new member of the CR family, your is the first response I have made
>>> to a CR quest.
>>>
>>> The short answer to your question is yes, a gear hanger can, and often
>>> is, used for such frames. Most frames before the sixties had drop-outs
>>> without integral hangers. Even those that did, in the 1950's, were cut off
>>> as they protruded beyond the width of the outside drop-out axle measurement
>>> and didn't allow a switch from the make of gear mech matched to the drop-out
>>> maker (Simplex, Cyclo etc).
>>>
>>> I have a number of spare gear hangers depending on the make of mech you
>>> would want to use if you purchased the Poyner a slsited on eBay. These are
>>> common acquisitions at any cycle jumble in the UK if that is where you
>>> reside.
>>>
>>> Let me know if and when I can help.
>>>
>>> Regards
>>> Derek Athey
>>>
>>> On Fri, Apr 23, 2010 at 11:59 AM, Mike Kelly <downlode@gmail.com>wrote:
>>>
>>>> Hi all,
>>>> I am on the hunt for a decent 531 or similar frame to build up into a
>>>> commuting road bike, and am inexperienced in bike building.
>>>> Looking at this fixie-fied Poyner bike -
>>>>
>>>> http://cgi.ebay.co.uk/
>>>> - the seller tells me that it can't be readapted into a geared bike
>>>> because
>>>> the derailleur hanger has been removed.
>>>> Would it be possible to get a new derailleur hanger ("adapter claw" in
>>>> Sheldon Brown-ese) that fitted into the axle slot?
>>>> Thanks,
>>>> Mike