On my Betty, the largest fenders I could fit were the 50mm steel Berthouds.
The fit withbtheb42 Hetres was so tight the tire sometimes ribbed the nuts
inside the fender. I downsized to the 38mm Compass tires and all has been
good ever since. Good clearance and excellent quality of the ride.
On my Atlantis, which has a narrower a crown fork (custom low trail) I fit
the same 50mm Berthouds with 40mm tires (previously) and now the Compass
38mm.
Recommend difference is 10-12mm, I believe.
René
On Friday, June 10, 2016, ascpgh wrote:
> Pursuing the paradox of more (supple tire width, fenders, brake clearance
> of both without contact at rest), I just installed Paul Racers and Compass
> Stampede Passes on my fendered Rambouillet. The center mount Racer caliper
> does an amazing job of keeping clear of the space reserved for tire and
> fender clearance at rest or in use. No more rattles from fenders against
> lumpy brake arms from off-center bumps!
>
> First impressions are exceedingly good on all functioning fronts, so much
> that I'm waiting until my miles tested assure validity before I pronounce
> the outcome an unqualified success.
>
> Andy Cheatham
> Pittsburgh
>
> On Friday, June 10, 2016 at 6:29:22 AM UTC-4, Steve Palincsar wrote:
>>
>>
>> On 06/10/2016 05:59 AM, Michael Hechmer wrote:
>>
>> This is true. My wife, Pat, has a Betty Foy, and now my daughter,
>> Suzanne, has a Chevy-ut. The fender width on these frames is limited by
>> the brake width. P45's just fit, in fact with the QR open the fender is
>> forced down onto the front tire. Pat got the demo Betty and it came
>> withP45s and the Fatty Bumpkin tires, which are 41 mm. They just barely
>> fit and the slightest misalignment caused them to rub. I ended up putting
>> the 41s on my Saluki, which has canti brakes & big VO fenders. I gave Pat
>> my 38mm Marathon Racers and they fit fine. Tires bigger than than 38
>> pretty much need cantis or V brakes. *Compass claims that their CP will
>> go wider but they require unique studs.* I see that GP has designed the
>> Clem for bigger posted brakes, which make more sense. I would rather spend
>> the extra setup time on good cantis than deal with a too tight
>> brake-fender-tire combo.
>>
>>
>> That's not a "claim," it's fact.
>>
>> The Compass centerpull can be thought of as a Mafac RAID version 1.1.
>> The RAID was available in a bolt-on version, and I have that brake on my
>> Kogswell P/R. With the straddle cable Q/R undone, it opens wide enough
>> that you never even notice the brake removing and replacing a 42mm Hetre.
>> The pivots are Mafac centerpull pivots, and if you have a pair of RAID
>> backing plates you could mount Compass brakes on any bike set up for
>> bolt-on centerpull brakes, so the studs aren't quite as "unique" as your
>> statement makes them sound. Thanks to the availability of the Compass
>> centerpull, the price of Mafac RAIDs on ebay has stopped its meteoric rise;
>> I just checked, and there's one set available right now complete with
>> levers for $150 BIN, and another NOS for $299. Compass makes the bushings,
>> etc. available, so if someone wanted to, they could buy a set of RAIDs on
>> ebay (all of which I've ever seen come with backing plates) and bring them
>> up to the level of the Compass brakes.
>>
>> Bottom line: if you're looking for a brake for your Rivendell that can
>> easily fit a tire the width of a Hetre, Mafac RAID centerpulls are a viable
>> option.
>>
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