Handlebar Stems

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25.4mm and smaller clamp diameter (look below!)
26.0mm clamp diameter
26.4mm clamp diameter

Quill stems come with different clamp diameters and occasionally different quill diameters.

Common clamp diameters are 25.4 (GB, most Cinelli steel, SR, many French, some Nitto and ITM) 26.4mm (Cinelli aluminium pre-1995 and some Cinelli steel), 26.0mm (3TTT, Mavic, some ITM, some Nitto, post 1995 Cinelli).

I personally think you can use 26.4mm stems with 26.0mm clamp bars but the official recommendation is that 26.4mm stems should be used with 26.4mm bars and 26.0mm stems should be used with 26.0mm bars.

We measure stems centre to centre across the top – this does not always correspond with the manufacturer's markings.

Please contact me at: hilarystone@hilarystone.com to check on availability and confirm shipping cost.

STEMS with 25.4mm Clamp diameter

CINELLI STEEL STEMS 25.4mm clamp diameter Most Cinelli steel stems have a 25.4mm
The first parts Cinelli made were bars and stems back in the 1940s. They quickly gained a repuation for being beautifully made. Most of their steel stems used 25.4mm clamp diameter but some lateer ones were made to fit the Cinelli bars with 26.4mm clamp diameter; these will be listed at: http://hilarystone.com/stems3.html

CINELLI STEEL ROAD STEMS 25.4mm clamp diameter

ST1 CINELLI STEEL ROAD STEM 7.5cm 25.4mm clamp diameter Very good slightly speckly original chrome £79

 

ST1A CINELLI STEEL ROAD STEM 12.5cm 25.4mm clamp diameter rechromed non original clamp bolt and expander bolt needs chroming £79

 


ST1B CINELLI STEEL ROAD STEM 7cm 25.4mm clamp diameter very good to excellent original chrome £95


CINELLI STEEL TRACK STEMS 25.4mm bar clamp diameter

Sorry none at present

 

 

GB HANDLEBAR STEMS 25.4mm handlebar clamp diameter
GB were an early pioneer at using aluminium for cycle components in the UK from 1945. Early stems wre of the girder pattern, these were reintroduced in the 1960s–70s again. The GB Spearpoint aluminium stem was available from the beginning of the 1950s through to the early 1970s… And further models were introduced in the 1960s. A few were made with 26mm bar clamp diameter in the 1980s; these will be listed seperately at: http://hilarystone.com/stems2.html

GB SPEARPOINT ALUMINIUM STEMS 25.4mm clamp diameter

ST3 GB SPEARPOINT ALUMINIUM STEM 6.5cm 25.4mm clamp diameter very good good though could do with more polishing £35

 


ST3A GB SPEARPOINT ALUMINIUM STEM 8cm 25.4mm clamp diameter with red GB nose bolt excellent £43

 

GB GIRDER STEMS 25.4mm clamp diameter

ST4 GB GIRDER STEM 5cm 25.4mm clamp diameter 1970s excellent near mint £35


GB STEEL STEMS 25.4mm clamp diameter late 1950s–1960s

Sorry none at present

 

GB 1960s-80s STEMS 25.4mm clamp diameter

ST6A GB 9.5cm STEM 25.4mm clamp diameter Hex expander bolt 1960s Excellent £29

 

ST6B GB 9cm STEM 25.4mm clamp diameter Allen expander bolt 1970s-80s Excellent near mint £35

 


ST6C GB 9.5cm STEM 25.4mm clamp diameter Hex expander bolt 1970s Excellent £33

 

ST6F GB BIBA STEM 10.5cm 25.4mm clamp diameter drilled for centre-pull/cantilever brakes some small marks £25


 

SR ROYAL STEMS 25.4mm bar clamp diameter

ST7 SR ROYAL STEM 9.5cm 25.4mm clamp diameter quite a lot of marks could be de-anodised and polished £29

 

SR OTHER STEMS 25.4mm bar clamp diameter

ST8 SR FORGED 10cm Excellent almost unused £21

 

ST8A SR FORGED 10cm Raleigh branded Excellent a few small marks £18

 

ST8B SR CAST 8cm Very good to excellent £12

 

ST8C SR CAST 8cm Very good insertion mark £12

 

ST8D SR CUSTOM 8cm Very good to excellent £14

 

ST8E SR FX 8.5cm Some scratches on top £12

 

ST8F SR FORGED 12cm 25.4mm clamp diameter Excellent £21

 

ST8G SR FORGED 8cm 25.4mm clamp diameter Very good £19

 

SHIMANO STEMS 25.4mm bar clamp diameter
These all use Shimano's hidden clamp bolt/expander bolts; they were made in both 25.4mm and 26mm sizes; the 26mm size can be found at: ttp://hilarystone.com/stems2.html

ST9 SHIMANO DURA-ACE AX STEM 11cm 25.4mm clamp diameter Excellent one or two small marks £55

 

MILREMO, PHILIPPE and PIVO STEMS 25.4mm handlebar clamp diameter
Really very attractive stems from the late 1950s through to the 1970s
.


Sorry none at present

 

AMBROSIO, 3TTT AND FIAMME STEMS 25.4mm bar clamp diameter
Made I think in the same factory for the most part… And were made to fit both 25.4mm and 26mm diameter bars. The 26mm diameter ones are listed on the 26mm stems page at: http://hilarystone.com/stems2.html

ST11 3TTT GRAN-PRIX STEM 13cm 25.4mm clamp diameter Earlier type with Hex head expander bolt Very good £32

 

ST11A 3TTT RECORD 11.5cm 25.4mm bar clamp diameter Excellent £39

 

ST11B FIAMME 9.5cm 25.4mm clamp diameter Very good £33

 

AVA STEMS 25.4mm handlebar clamp diameter
French maker of handlebars and stems from the late 1930s through to the 1970s, an early pioneer in using aluminium.

ST13 AVA STEM 8.5cm 25.4mm clamp diameter 1940s-50s Excellent £45

 

 

PRESTO STEMS 25.4mm handlebar clamp diameter
1940s–50s British maker of stems

Sorry none at present

 

STRATA STEMS 25.4mm handlebar clamp diameter
1940s–50s British maker of bars, stems, brakes etc, a competitor to GB at the time.

ST15A STRATA STEM 7cm 25.4mm clamp diameter 1940s–50s Very good £45

 

HAND CUT FANCY LUG STEMS 25.4mm handlebar clamp diameter

Sorry none at present

 

STEMS FOR HEADCLIP FITTING without expander bolt 25.4mm handlebar clamp diameter

ST18 PRESTO 8cm for HEADCLIP FITTING 25.4mm clamp diameter 1940s–50s needs plating £35

 

ST18A NO-NAME 6cm 25.4mm clamp diameter probably pre-war needs plating needs plating £35

 

REYNOLDS STEMS FOR HEADCLIP FITTING without expander bolt 25.4mm bar clamp diameter
Made by the same company as 531 tubing in aluminium from the mid 1930s through to the 1950s.

Sorry none at present

 

OTHER MAKES 25.4mm bar clamp diameter


ST20 ELSNER 15cm TRACK STEM 25.4mm clamp diameter Stunning & spectacular £85

 

ST20A FORGINAL STEM 9cm 25.4mm clamp diameter 1980s excellent £29

 

ST20B NO-NAME ALUMINIUM STEM 6cm 25.4mm clamp diameter Excellent £33

 

25.4mm CLAMP STEMS with FRENCH (22.0mm) dimensioned QUILL

ST21 ATAX 7.5cm with built-in shifter mounts 22.0cm quill (French) Excellent £34

 

ST21A ATAX STEM 7.5cm 25.4mm clamp diameter ** New Old Stock** £29

 

ST21E AVA STEM 8cm 25.4mm clamp diameter1940s–50s Excellent £39

 

ST22 PHILIPPE TRACK ADJUSTABLE STEM FRENCH 22mm QUILL 24.5mm bar clamp diameter very good to excellent £125

 

 

 

STEMS with smaller than 25.4mm bar clamp diameter

EXPANDER BOLT STEMS BAR CLAMP DIAMETERS SMALLER THAN 25.4mm

ST28 HAND CUT LUGGED STEM 10cm 24.5mm bar clamp diameter rechromed but chrome flaking on clamp area £45

 

ST28B HAND CUT LUGGED STEM 7cm 24.5mm bar clamp diameter chrome flaking on clamp area £45

 

ST28C NO-NAME STEEL STEM 2.5cm 23.5mm bar clamp diameter 1930s Excellent £35


HEADCLIP TYPE STEMS BAR CLAMP DIAMETERS SMALLER THAN 25.4mm

ST29 CHATER LEA HEADCLIP TYPE STEM 6.5cm for tandem sized steerer 24mm bar clamp diameter needs replating £33

 

ST29B SWAN-NECK STEM 7.5cm 24mm bar clamp diameter 1930s chrome a little speckled £43

 

 



Shipping costs:

UK: £4
Europe: £8
North America: £10
Worldwide: £14


The figures above are
estimates,rates may change in
special circimstances.
Contact us for more info.


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