Bottom Bracket Gears?

General cycling advice ( NOT technical ! )
Mike_Ayling
Posts: 174
Joined: 25 Sep 2017, 3:02am
Location: Melbourne Australia

Re: Bottom Bracket Gears?

Postby Mike_Ayling » 29 May 2018, 12:41am

The Pinion has two further advantages over the Rohloff and indeed all other IGHs: first, its central position means better weight distribution than the "rear-heavy" IGH; and second, rear wheel removal is easier without having to disturb the shift cable(s).


If you have the Rohloff EX box you simply unscrew a thumb screw and remove the EX box from the hub. Takes no time at all.

Mike

Manc33
Posts: 1443
Joined: 25 Apr 2015, 9:37pm

Re: Bottom Bracket Gears?

Postby Manc33 » 30 May 2018, 10:52pm

Sounds like you are either going to either have a big fat bottom bracket, or not many gears, if you had both then magic is occurring somewhere (or an internal geared BB that's going to wear out fast). If I was going this route I'd get a Rohloff Speedhub. We can dream. :)
Only weird bikes are interesting anymore.

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Cunobelin
Posts: 9502
Joined: 6 Feb 2007, 7:22pm

Re: Bottom Bracket Gears?

Postby Cunobelin » 31 May 2018, 9:09am

MY Gekko has a 20" rear wheel with Rohloff and spinning out was an issue

A Sclumpf HSD combined with the Rohloff gives a massive gear range that allows for speeding along the flats, and climbing steep hills

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[XAP]Bob
Posts: 16896
Joined: 26 Sep 2008, 4:12pm

Re: Bottom Bracket Gears?

Postby [XAP]Bob » 31 May 2018, 9:28am

Manc33 wrote:Sounds like you are either going to either have a big fat bottom bracket, or not many gears, if you had both then magic is occurring somewhere (or an internal geared BB that's going to wear out fast). If I was going this route I'd get a Rohloff Speedhub. We can dream. :)


The pinion is a specialist 'big fat' bottom bracket.
The schlumpf isn't, but only has two gears (albeit very widely spaced in the HSD)
A shortcut has to be a challenge, otherwise it would just be the way. No situation is so dire that panic cannot make it worse.
There are two kinds of people in this world: those can extrapolate from incomplete data.

Inigo
Posts: 1
Joined: 27 Aug 2019, 1:08pm

Re: Bottom Bracket Gears?

Postby Inigo » 27 Aug 2019, 1:15pm

elduderino wrote:I purchased a Kalkhoff P18 through 50cycles in Loughborough.
I replaced the handlebars & headstem ( I prefer sitting upright on a bike). Replaced the seat post with a suntour cam action seatpost, & my most comfortable Brooks B67 saddle .
Replaced the tyres with my schwalbe Marathon plus tour’s
My average speed is 11mph , & it’s the most enjoyable cycle riding I have ever had, & can’t wait to jump on the thing.


Hey there. Just stumbled across this post. I am looking at buying a Kalkhoff P18 at the moment, but I'm struggling to find accurate specs. In particular, I would like to know what the total weight of the bike is! I have seen quite varying numbers. For example, in the specs of this Youtube video it is given as 16.35kg which seems ridiculously heavy for a non-ebike and puts me off. Conversely, the archived page from the Kalkhoff site gives it as "130kg" (I assume they mean 13.0kg!) which seems much more reasonable.

Can you comment on which is closer to the truth? How do you find the weight of the bike?

I hope you see this, I would hugely appreciate your reply if you do. Many thanks.