S-flex means owning a bespoke cross-country mountain bike that absorbs shock only when needed. J-emm created the S-flex optimising a Professional Cross Country mountain biker’s needs of unifying a Front- Suspension and a Full-Suspension Competition bike in one bicycle. The rear triangle is unique in its kind, firm and controlled on regular terrain, But when it encounters uneven ground it activates and ensures that most of the shocks generated front and back is absorbed, keeping you always in control.

All this is achieved thanks to a special carbon formula and a special layering that allows precise and controlled bending of the parts of the rear triangle of up to 30mm


  • Frame Weight 1280 gr
  • Standard Measurements S-M-L-XL * Also on Size
  • Frame certified by the Malignani ISO 4210-6 institute
  • Lifetime warranty
  • 100% MADE IN ITALY certification IT01

Geometry Sizing

A Nominal c/c Length 570 590 610 625
B C/f Height 400 440 480 520
C Geometry Sloping 74° 73° 72,5° 72°
D Rear Triangle Length 440 440 440 440
E Headtube Height 105 110 110 120

Sales Condition

Quotation and Order

JEMM is handmade in Italy, the estimated time for delivery is about 60 days for custom geometry and custom painting or 30 days for standard sizes and custom painting.

For a quotation, please follow these steps:

Fill out the pre-order form.

You will receive a mail to confirming the settings of your frame the total price, including shipping and estimated delivery time (we can provide a quotation for bikes assembled with Campagnolo ,Shimano and SRAM groups).

Order and delivery:

To confirm your order we ask you to pay 50% of the total amount. When your frame is ready we ask you to pay the remaining 50% We will deliver the frame to your address via MAILBOX as soon as payment is complete.

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