Kalkhoff pro connect impulse 9 test

At just over 20kg (44lb) und with ns frame geometry of a sporty 700c-wheeled racer, Kalkhoff’s zum Connect is one of the lightest und highest quality electrical bikes around. It rides fast and goes a ground-breakingly lang way top top a einzel charge.

Du schaust: Kalkhoff pro connect impulse 9 test

Ride & handling: motiv helps you get up even alpine-style gradients

When you get top top the Pro Connect ns it’s easy to forget it’s an electric bike und ride it like a sporty tourer – until you hit the hills, wie man the motiv comes right into its own.

collection to stärke level one von three, freundin get a small but appreciable assist wie man even irradiate pressure is applied to the cranks. This ist great zum easier yet nagging gradients, particularly if walking into die wind and with a touring load. Level two gets sie up lang hills into stiff headwinds and level three kann sein cope v alpine-style gradients.


It’s possible kommen sie do well over 40 miles von battery, putting ns Kalkhoff means ahead von any other electric bike out there an terms des lightness, efficiency und range. The only fence is rattling from ns battery casing.

With a recharge time des about 5 hours, this would be a an excellent long-distance commuter, while sports riders recovering native injury may so give it much more than a passing glance. Anyone looking zum a wenig help over lang distances when travelling at speed would find it ideal.


Chassis: lang wheelbase adds stability, fork offers comfortable rideThe pro Connect aussehen somewhat ungainly due to its ‘stretched’ rear end – the chainstays und seatstays oase been elongated to make room zum the motor, which sits behind ns seat tube. This adds stability weist speed, without making cornering too much of a handful.

The Kalkhoff’s 20kg (44lb) heft ist noticeable hinweisen low speeds but die bike zu sein well balanced, with a low centre of gravity, und the weight zu sein soon forgotten once ns electric pedal assistance kicks in.

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The unbranded carbon fork shaves a wenig weight und gives straight steering through no noticeable flex, yet with a welcome hint of compliance over turbulent ground.


Equipment: deluxe Shimano kit helps make bike a joy kommen sie useIt`s not nur the 250 watt Panasonic motor (fitted discreetly behind the bottom bracket) and the lithium ion 10 amp hour battery that room super-efficient. 

The Shimano wheelset with wide flange hubs und nine-speed Shimano Deore XT gear setup room the kind of racing kit that has actually never previously appeared on a production pedelec. Once electric power ist added zu this kind of spec, it really zu sein a joy kommen sie use.

The powerful V-brakes perform a good job of protecting against what zu sein quite a hefty bike, and the kick stand is a pretty touch.

Our main gripes were die narrow equipment range and a fairly uncomfy saddle – but both space down to angestellter taste and easily changed.


OptionsThe bike möchte appear bei the UK bei two incarnations:

Pro attach Alfine with out-of-the-box top speed des 15.5mph. This kann be increased, von changing ns number von teeth on die rear sprocket, kommen sie approach 20mph. Comes v Shimano’s eight-speed Alfine hub gear. Price about £1,495.

Pro attach S with top speed of 25mph. Comes through nine-speed Shimano Deore XT, magnesium alloy Kalkhoff Verso adjustable forks and upgraded Panasonic motiv (with schwarz casing). Due weil das later release than die Alfine. Price about £1,795.

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Product Specifications

Name Pro attach Pedelectric (09)
Brand Kalkhoff
Available Sizes 45 49 53cm 57 61cm
Rear Derailleur 105 lang cage
Year 2009
Weight (kg) 16.72
Stem Extreme height adjustable, forged alloy, 4 bolt 25.4 riegel clamp, twin bolt 1 1/8" steerer clamp
Shifters SLR 440 9 rate pod
Seatpost Extreme forged alloy pair bolt clamp, 27.2 mm dia, 250 mm length
Seat Angle 71
Saddle Freccia, padded vinyl with cromo rails
Rims WH-RS10 pre-built, machined alloy aero rims through standard ball und cone alloy hubs, straight pull, 16 bladed stainless radial spokes front, 20 / two cross rear, alloy nipples
Rear Wheel Weight 1720
Rear tire Size 700x30C
Rear Tyre Marathon Racer
Head Angle 71
Bottom Bracket Sealed cartridge, stole square taper
Handlebar Concept too much alloy flat bar, 58 cm width
Front Wheel Weight 1292
Front tyre Size 700x30C
Front Tyre Marathon
Frame Weight 6730
Frame Material tig-welded complete aluminium structure with 250 w Panasonic motor and 26V / 10AH Li-Ion battery.
Fork Weight 750
Fork Carbon fork chisels with alloy 1 1/8" external inspection threadless steerer, crown and dropouts
Cranks Sealed cartridge, stole square taper
Cassette Shimano HG-50 9spd steel cogs
Brakes Single digit 7 alloy V"s, Tektro Carbon Eclipse levers
Weight (lb) 36.9